Spanish Royals Host A Dinner Gala For President Of Portugal Marcelo Rebelo De Sousa at the Royal Palace on April 16, 2018 in Madrid, Spain.

(L) Queen Letizia of Spain wore a floor-sweeping blue gown with cut out detailing under the arms and at the back, as she meets Spanish tennis player Garbine Muguruza, alongside with Portuguese President Marcelo Rebelo (C) and her husband King Felipe VI of Spain (R) as they attended a state dinner 2018 at the royal palace in Madrid

King Felipe VI of Spain (R) and Queen Letizia of Spain, who wore a show-stopping pearl tiara first owned by Queen Victoria Eugenia in 1906, host a dinner gala for the President of Portugal Marcelo Rebelo de Sousa at the Royal Palace on April 16, 2018, in Madrid, Spain.

(L-R) Queen Letizia of Spain's striking blue gown was a far cry from the more demure clothes she is known for, President of Portugal Marcelo Rebelo de Sousa and King Felipe VI of Spain greet guests during a dinner gala 2018 for the President of Portugal Marcelo Rebelo de Sousa at the Royal Palace in Madrid, Spain.

(L-R) Queen Letizia of Spain, President of Portugal Marcelo Rebelo de Sousa and King Felipe VI of Spain attend a dinner gala for the President of Portugal Marcelo Rebelo de Sousa at the Royal Palace on April 16, 2018, in Madrid, Spain.

(L-R) Queen Letizia of Spain, President of Portugal Marcelo Rebelo de Sousa, who greet Spanish Prime Minister Mariano Rajoy and King Felipe VI of Spain greet guests during a dinner gala 2018 for the President of Portugal Marcelo Rebelo de Sousa at the Royal Palace in Madrid, Spain.

(L-R) Queen Letizia of Spain, President of Portugal Marcelo Rebelo de Sousa and King Felipe VI of Spain attend a dinner gala for the President of Portugal Marcelo Rebelo de Sousa at the Royal Palace on April 16, 2018, in Madrid, Spain

(L-R) Queen Letizia of Spain, President of Portugal Marcelo Rebelo de Sousa and King Felipe VI of Spain attend a dinner gala for the President of Portugal Marcelo Rebelo de Sousa at the Royal Palace on April 16, 2018, in Madrid, Spain

(L-R) Queen Letizia of Spain, President of Portugal Marcelo Rebelo de Sousa and King Felipe VI of Spain, mingled with Spanish Prime Minister Mariano Rajoy as they greet guests in a dinner gala 2018 for the President of Portugal Marcelo Rebelo de Sousa at the Royal Palace in Madrid, Spain.

(L-R) Queen Letizia of Spain, President of Portugal Marcelo Rebelo de Sousa and King Felipe VI of Spain attend a dinner gala 2018 for the President of Portugal Marcelo Rebelo de Sousa at the Royal Palace in Madrid, Spain.

(L-R) Queen Letizia of Spain, President of Portugal Marcelo Rebelo de Sousa and King Felipe VI of Spain attend a dinner gala 2018 at the Royal Palace in Madrid, Spain. During the evening, King Felipe spoke of the unity between Spain and Portugal and their shared values.

King Felipe VI of Spain (R) and Queen Letizia of Spain's modern-dress had a pearl detail from top to bottom, and she accessorized with a regal red sash as they host a dinner gala 2018 for the President of Portugal Marcelo Rebelo de Sousa at the Royal Palace in Madrid, Spain.

(L-R) Queen Letizia of Spain's racy gown had a slash on the side and flashed a peak of The Queen's thigh as she walked, President of Portugal Marcelo Rebelo de Sousa and King Felipe VI of Spain attend a dinner gala 2018 at the Royal Palace in Madrid, Spain.

Queen Letizia of Spain's Cartier Diamond and Pearl Tiara was given to Queen Victoria Eugenia, known as Queen Ena, as a wedding present from her own mother-in-law Queen Maria Cristina of Spain

Queen Letizia of Spain wore a Cartier Diamond and Pearl Tiara that once belonged to the former Queen Sofía as she joined her husband for an opulent state banquet 2018 in Madrid.

Queen Letizia of Spain looked resplendent in a Madrid-based designed gown by Ana Locking along with Nina Ricci heels and a stunning Cartier tiara. The blue gown certainly made Queen Letizia stand out from the crowds as she joined her husband at the evening event at the Royal Palace in Madrid.

Queen Letizia of Spain's striking pearl embellished dress featured cut-out detailing around her underarm and back, flashing just a hint of her skin and she accessorized with a regal red sash, during a state dinner at the Royal Palace in Madrid

Queen Letizia of Spain attended the event at the Royal Palace in the Spanish city in a floor-sweeping blue gown with pearl embellished, cut out detailing under the arms and at the back by Ana Locking and the striking headwear.

Queen Letizia of Spain wore dark eye makeup and a dash of mauve lipgloss and stuns in Cartier Diamond and Pearl Tiara as she attended the swanky event at the Royal Palace in Madrid

Queen Letizia of Spain looked regal as she offered President Rebelo de Sousa of Portugal a cheek to kiss before the start of the glamorous dinner as she joined her husband King Felipa VI of Spain at the evening event

(L-R) Queen Letizia of Spain's blue dress flaunted her slim figure as they greeted guests with President of Portugal Marcelo Rebelo de Sousa and husband King Felipe VI of Spain during a dinner gala 2018 at the Royal Palace in Madrid, Spain.

The Cartier Diamond and Pearl Tiara have been worn by Queen Letizia's mother-in-law Queen Sofia of Spain during several state events pictured during the wedding of Crown Prince Frederik and Mary Donaldson in Copenhagen on May 14, 2004.

Queen Letizia of Spain dazzled in Ana Locking spring 2017 pearl embellished blue gown along with Nina Ricci heels and a stunning Cartier tiara and Pearl Tiara, as she attends a state dinner 2018 at the Toyal Palace in Madrid

Queen Letizia of Spain in a floor-sweeping blue gown with pearl detailing by Ana Locking and the striking Cartier Diamond and Pearl Tiara, attended a state dinner with her dapper husband King Felipe VI of Spain at the Royal Palace in Madrid

Queen Letizia of Spain's striking pearl embellished dress featured cut-out detailing around her underarm and back, flashing just a hint of her skin and she accessorized with a regal red sash and a stunning Cartier tiara, during a state dinner 2018 at the Royal Palace in Madrid

(L-R) Queen Letizia of Spain and President of Portugal Marcelo Rebelo de Sousa greet guests during a dinner gala 2018 at the Royal Palace in Madrid, Spain.

Queen Letizia looked resplendent in an Ana Locking spring 2017 pearl embellished gown along with Nina Ricci heels and a stunning Cartier tiara, attended the event at the Royal Palace in Madrid

Queen Letizia of Spain dazzle in a pearl embellished blue gown attended a state dinner with her husband King Felipe VI of Spain, who looks dapper in black tux in Madrid.

Queen Letizia of Spain wore a floor-sweeping pearl embellished blue gown with cut out detailing under the arms and at the back by Ana Locking and a stunning Cartier Diamond and Pearl Tiara, attended the event at the Royal Palace in the Spanish city of Madrid.

Queen Letizia of Spain in a floor-sweeping Ana Locking blue gown with pearl detailing from top to bottom, and she accessorized with a regal red sash and striking Cartier Diamond and Pearl Tiara, during a state dinner 2018 at the Royal Palace in Madrid

The Ana Locking blue gown certainly made Queen Letizia of Spain stand out from the crowds as she joined her husband Kig Felipe VI of Spain at the evening event at the Royal Palace in Madrid.

Queen Letizia of Spain wore a striking blue gown by Ana Locking and a stunning Cartier tiara, hosts a dinner gala 2018 for the President of Portugal Marcelo Rebelo de Sousa at the Royal Palace in Madrid, Spain.

Queen Letizia of Spain wore a floor-sweeping pearl embellished blue gown with cut out detailing under the arms and at the back by Ana Locking and a stunning Cartier Diamond and Pearl Tiara, attended the event at the Royal Palace in the Spanish city of Madrid.

Dutch Royals Visit Portugal - Day 1 on October 09, 2017 in Lisboa

Queen Maxima wore top to toe purple with a pink shawl and a giant beetle necklace, as The Dutch royals are in Portugal for a two day state visit.

Queen Maxima of The Netherlands arrives at the military airport Figo Maduro on October 09, 2017 in Lisboa CDP, Portugal.

Dutch King Willem-Alexander looked jovial as he stepped onto the tarmac in Lisbon followed by his wife Queen Maxima

Queen Maxima of The Netherlands arrives at the military airport Figo Maduro on October 09, 2017 in Lisboa CDP, Portugal.

Queen Maxima of the Netherlands, wore her blonde hair loose and smiled for the cameras, wearing rather dramatic accessory was an enormous gold necklace with a pendant shaped like a beetle, arrives at the military airport Figo Maduro in Lisboa CDP, Portugal

Queen Maxima of The Netherlands arrives at the military airport Figo Maduro on October 09, 2017 in Lisboa CDP, Portugal.

King Willem-Alexander of The Netherlands arrives at the military airport Figo Maduro on October 09, 2017 in Lisboa CDP, Portugal.

Queen Maxima of the Netherlands in a dramatic enormous gold necklace with a pendant shaped like a beetle arrived in Portugal

King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands arrive at the military airport Figo Maduro on October 09, 2017 in Lisboa CDP, Portugal.

Queen Maxima of the Netherlands accessorised her purple outfit with a pink shawl trimmed with gold and an unusual beetle necklace, arrives at the military airport Figo Maduro on October 09, 2017 in Lisboa CDP, Portugal

Dutch Queen Maxima was treated to a tender kiss on the hand by President Marcelo Rebelo de Sousa of the Portuguese Republic as Dutch King Willem-Alexander looks on, on October 10, 2017

Queen Maxima was dressed to impress in a figure-hugging brown ensemble during an official welcome ceremony at the Mosteiro dos Jeronimos on October 10, 2017 in Lisboa CDP, Portugal.

Portugal's President Marcelo Rebelo de Sousa (R ) King Willem-Alexander (C ) and Queen Maxima (L ) of the Netherlands during a welcome ceremony at the Jeronimos Monastery in Lisbon, on October 10, 2017, in the first of a 3 days Royals state visit to Portugal.

Queen Maxima of the Netherlands during a welcome ceremony at the Jeronimos Monastery in Lisbon, on October 10, 2017, in the first of a 3 days Royals state visit to Portugal.

King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands welcomed by President Marcelo Rebelo de Sousa of Portugal during an official welcome ceremony at the Mosteiro dos Jeronimos on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of the Netherlands looks on at the Belem Palace in Lisbon, on October 10, 2017, in the first of a 3 days Royals state visit to Portugal.

Queen Maxima of The Netherlands welcomed by President Marcelo Rebelo de Sousa of Portugal during an official welcome ceremony at the Mosteiro dos Jeronimos on October 10, 2017 in Lisboa CDP, Portugal.

King Willem-Alexander of the Netherlands (L) and Portugal's President Marcelo Rebelo de Sousa (not seen) give a joint statement to the press after their meeting at the Belem Palace in Lisbon, on October 10, 2017, in the first of a 3 days Royals state visit to Portugal.

Queen Maxima of the Netherlands during a welcome ceremony at the Jeronimos Monastery in Lisbon, on October 10, 2017, in the first of a 3 days Royals state visit to Portugal.

Queen Maxima of the Netherlands during a welcome ceremony at the Jeronimos Monastery in Lisbon, on October 10, 2017, in the first of a 3 days Royals state visit to Portugal.

Queen Maxima of The Netherlands welcomed by President Marcelo Rebelo de Sousa of Portugal during an official welcome ceremony at the Mosteiro dos Jeronimos on October 10, 2017 in Lisboa CDP, Portugal.

King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands are welcomed by President Marcelo Rebelo de Sousa of Portugal during an official welcome ceremony at the Mosteiro dos Jeronimos on October 10, 2017 in Lisboa CDP, Portugal.

Portuguese President Marcelo Rebelo de Sousa (R) greets King Willem-Alexander of the Netherlands during a welcoming ceremony at the presidential palace in Belem in the outskirts of Lisbon on October 10, 2017.

Portuguese President Marcelo Rebelo de Sousa (R) shakes hands with King Willem-Alexander of the Netherlands after a joint statement at the presidential palace in Belem in the outskirts of Lisbon on October 10, 2017.

Queen Maxima of The Netherlands visit the chairman of the parliament Ferro Rodrigues at the Palacio de Sao Bento on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of The Netherlands visit the chairman of the parliament Ferro Rodrigues at the Palacio de Sao Bento on October 10, 2017 in Lisboa CDP, Portugal.

Portuguese President Marcelo Rebelo de Sousa (C), King Willem-Alexander of The Netherlands (L) and Queen Maxima of The Netherlands (R) listen to both countries national anthems outside Jeronimos Monastery on October 10, 2017 in Lisboa CDP, Portugal. Dutch Royals are on a three-days state visit to Portugal.

King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands during a tram ride on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of The Netherlands visits President Marcelo Rebelo de Sousa of Portugal at Palacio de Belem on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of The Netherlands visit the areas Mouraria and Intendente on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of The Netherlands during a trim ride on October 10, 2017 in Lisboa CDP, Portugal.

King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands visit mayor Fernando Medina of Lissabon at Camara Municipal de Lisboa on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of The Netherlands visits mayor Fernando Medina of Lissabon at Camara Municipal de Lisboa on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of The Netherlands visit President Marcelo Rebelo de Sousa of Portugal at Palacio de Belem on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of The Netherlands visits President Marcelo Rebelo de Sousa of Portugal at Palacio de Belem on October 10, 2017 in Lisboa CDP, Portugal.

King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands visit mayor Fernando Medina of Lissabon at Camara Municipal de Lisboa on October 10, 2017 in Lisboa CDP, Portugal.

King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands visit the areas Mouraria and Intendente on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of The Netherlands visits President Marcelo Rebelo de Sousa of Portugal at Palacio de Belem on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of The Netherlands visits President Marcelo Rebelo de Sousa of Portugal at Palacio de Belem on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of The Netherlands visits President Marcelo Rebelo de Sousa of Portugal at Palacio de Belem on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of The Netherlands visits the areas Mouraria and Intendente on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of The Netherlands welcomed by President Marcelo Rebelo de Sousa of Portugal during an official welcome ceremony at the Mosteiro dos Jeronimos on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of the Netherlands in a dazzling emerald gown a nod to the Portuguese flag from Dutch designer Jan Taminiau. She top it off with a Dutch Emerald Parure Tiara, a royal heirloom set with pearls and emeralds believed to to have belonged to Princess Wilhelmina of Prussia, wife of William V, Prince of Orange, as she attends at a royal banquet in Portugal.

Queen Maxima of the Netherlands in a Dutch Emerald Parure Tiara, a royal heirloom set with pearls and emeralds which are thought to have belonged to Princess Wilhelmina of Prussia, Princess of Orange, as she attends Portuguese state banquet.

King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands during the official state banquet hosted by President Marcelo Rebelo de Sousa of Portugal at the Palacio da Ajuda on October 10, 2017 in Lisboa CDP, Portugal.

Dutch Queen Maxima opted a dazzling frock featured delicate leaf detailing in the skirt by Dutch designer Jan Taminiau and was paired with matching emerald jewelry, during the Portuguese state banquet.

(L-R) Queen Maxima of the Netherlands and her husband King Willem-Alexander of the Netherlands are on a three-day state visit and the monarch looked just as chic on her arrival for the Portuguese state banquet with President Marcelo Rebelo de Sousa of Portugal at the Palacio da Ajuda

King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands during the official state banquet offered by President Marcelo Rebelo de Sousa of Portugal at the Palacio da Ajuda on October 10, 2017 in Lisboa CDP, Portugal.

 Queen Maxima of The Netherlands during the official state banquet hosted by President Marcelo Rebelo de Sousa of Portugal at the Palacio da Ajuda on October 10, 2017 in Lisboa CDP, Portugal.

(L) King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands during the official state banquet hosted by President Marcelo Rebelo de Sousa of Portugal (center) at the Palacio da Ajuda on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of The Netherlands during the official state banquet at the Palacio da Ajuda on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of the Netherlands in a dazzling emerald gown by Dutch designer Jan Taminiau. She opted a sparkling Dutch Emerald Parure Tiara, a royal heirloom set with pearls and emeralds, during the official state banquet at the Palacio da Ajuda in Portugal

Queen Maxima of the Netherlands in a Dutch Emerald Parure Tiara, a royal heirloom set with pearls and emeralds which are thought to have belonged to Princess Wilhelmina of Prussia, Princess of Orange, as she attends Portuguese state banquet.

King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands during the official state banquet hosted by President Marcelo Rebelo de Sousa of Portugal at the Palacio da Ajuda on October 10, 2017 in Lisboa CDP, Portugal.

King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands during the official state banquet hosted by President Marcelo Rebelo de Sousa of Portugal at the Palacio da Ajuda on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of the Netherlands in a Dutch Emerald Parure Tiara, a royal heirloom set with pearls and emeralds which are thought to have belonged to Wilhelmina of Prussia, Princess of Orange, as she attends Portuguese state banquet.

Queen Maxima of The Netherlands back details of her emerald Jan Taminiau gown, featured delicate leaf detailing, during the official state banquet at the Palacio da Ajuda in Portugal.

Queen Maxima of the Netherlands in a dazzling emerald gown by Dutch designer Jan Taminiau. She opted a sparkling Dutch Emerald Parure Tiara, a royal heirloom set with pearls and emeralds, during the official state banquet at the Palacio da Ajuda in Portugal

Queen Maxima of the Netherlands in a Dutch Emerald Parure Tiara, a royal heirloom set with pearls and emeralds which are thought to have belonged to Princess Wilhelmina of Prussia, Princess of Orange, as she attends Portuguese state banquet.

(L) King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands during the official state banquet hosted by President Marcelo Rebelo de Sousa of Portugal at the Palacio da Ajuda on October 10, 2017 in Lisboa CDP, Portugal.

(L) King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands during the official state banquet hosted by President Marcelo Rebelo de Sousa of Portugal (center) at the Palacio da Ajuda on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of the Netherlands in a Dutch Emerald Parure Tiara, a royal heirloom set with pearls and emeralds which are thought to have belonged to Wilhelmina of Prussia, Princess of Orange, as she attends Portuguese state banquet.

King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands during the official state banquet offered by President Marcelo Rebelo de Sousa of Portugal at the Palacio da Ajuda on October 10, 2017 in Lisboa CDP, Portugal.

Dom Duarte Pio, Duke of Braganza visit mayor Fernando Medina of Lissabon at Camara Municipal de Lisboa on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of the Netherlands in a Dutch Emerald Parure Tiara, a royal heirloom set with pearls and emeralds which are thought to have belonged to Wilhelmina of Prussia, Princess of Orange, as she attends Portuguese state banquet.

King Willem-Alexander of The Netherlands during the official state banquet offered by President Marcelo Rebelo de Sousa of Portugal at the Palacio da Ajuda on October 10, 2017 in Lisboa CDP, Portugal.

Queen Maxima of The Netherlands during the official state banquet offered by President Marcelo Rebelo de Sousa of Portugal (L) at the Palacio da Ajuda on October 10, 2017 in Lisboa CDP, Portugal.