Royal Family Around the World: The Duke and Duchess Of Cambridge Attend The Royal Variety Performance at the Palladium Theatre on November November 24, 2017 in London, England.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Royal Variety Performance at the Palladium Theatre on November November 24, 2017 in London, England.

The Duchess of Cambridge, who is four months pregnant, looked radiant in her heavily embellished Jenny Packham Fall 2017 dress, as she arrived at The Royal Variety Performance in London

Catherine, Duchess of Cambridge, looked elegant as she arrived at the 105th Royal Variety Performance in her floor length bespoke Jenny Packham blue dress and silver stiletto heels.

Catherine, Duchess of Cambridge attends the Royal Variety Performance at the Palladium Theatre on November November 24, 2017 in London, England.

Prince William, Duke of Cambridge looked dapper in black tie and Catherine, Duchess of Cambridge joined a dazzling array of stars as they arrives at the Royal Variety Performance show. The Duchess of Cambridge who is four months pregnant with the couple's third child, looked stunning in a crystal-embellished, blue gown.

The Duchess of Cambridge smiled warmly at guests who is four months pregnant with their third child, looked stunning in a crystal-embellished, blue gown by Jenny Packham, as her husband, Prince William, Duke of Cambridge look dapper in a black tie, shook hands with attendees as they arrives at the Royal Variety Performance show.

The Duchess of Cambridge looked radiant in rhinestones, her brown hair was styled in soft curls which framed her face and fell onto her shoulders as she arrived at The Royal Variety Performance in London

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Royal Variety Performance at the Palladium Theatre on November November 24, 2017 in London, England.

Catherine, Duchess of Cambridge, wearing a sparkling Jenny Packham gown, and Prince William, Duke of Cambridge, in black tie, went straight into the auditorium in time for the national anthem, and are due to meet performers on stage after the show.

The Duke and Duchess of Cambridge smiled as they drove through central London to attend the show at The Royal Variety Performance.

Catherine, Duchess of Cambridge glowed in a glittering long sleeved gown, before the event at the London Palladium in central London

The Duchess of Cambridge beamed at the performance from her seat in the Royal Box at the theatre in London.

(R) Prince William, Duke of Cambridge, howled with laughter from their seat in the Royal Box at the theatre in London

(R) Prince William, Duke of Cambridge attend the Royal Variety Performance at the Palladium Theatre on November November 24, 2017 in London, England.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge seemed to thoroughly enjoy the 105th Royal Variety Performance Show as they sat in the Royal Box which was festooned with red flowers

Catherine, Duchess of Cambridge looked elegant as she arrived at the 105th Royal Variety Performance in her floor length bespoke Jenny Packham blue dress and silver stiletto heels while Prince William, Duke of Cambridge looked dapper in black tie.

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the Royal Variety Performance at the Palladium Theatre on November 24, 2017 in London, England.

Prince William, Duke of Cambridge looked dapper in black tie, joined by his wife Catherine, Duchess of Cambridge looked stunning in a crystal-embellished, blue gown, she pair with a silver stilettos were visible under the hem of her long blue dress as they arrives at the Royal Variety Performance show.

The Duchess of Cambridge beamed at the performance as her husband Prince William, Duke of Cambridge (C) howled with laughter from their seat in the Royal Box at the theatre

The Duchess of Cambridge wore drop diamond earrings, her hair was in curls and her Jenny Packham dress reflected the light

The Duke and Duchess of Cambridge were illuminated in the Royal Box (right) as they attended the Royal Variety Performance at the London Palladium in central London

Catherine, Duchess of Cambridge looked radiant as ever as she arrived at The Royal Variety Performance in London, wearing a floor length bespoke Jenny Packham dress, she accessorize with drop diamond earrings and a pair of silver stilettos.

A glowing Catherine, Duchess of Cambridge waved to onlookers as she left the venue at The Royal Variety Performance in London

Catherine, Duchess of Cambridge waved to the crowds as she left the venue, at the Royal Variety Show at London Palladium

The Duchess of Cambridge, who is four months pregnant with their third child, looked stunning in a crystal-embellished, blue gown, attends at The Royal Variety Performance in London.

The Duke and Duchess of Cambridge joined a dazzling array of stars at the Royal Variety Performance show.

The Duke and Duchess of Cambridge were pictured as they left the Royal Variety Performance show in London

Catherine, Duchess of Cambridge last attended the event in 2014, who was then pregnant with Princess Charlotte, showed off her burgeoning bump in a black lace gown from Diane von Furstenberg

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge descend the stairs, lined with a red carpet at the London Palladium

Prince William, Duke of Cambridge complements performers from the dance, physical theatre and circus troupe Circus Abyssinia after the show in London as Catherine, Duchess of Cambridge looks on.

Comedian Miranda Hart (left) cajoled Prince William into performing in a comedy sketch show from the royal box at tonight's Royal Variety Show

Catherine, Duchess of Cambridge greets them and chats enthusiastically with everyone after the show finished tonight in London

The Duchess of Cambridge thanked all the performers after the 105th Royal Variety Performance Show at the The London Palladium

Catherine, Duchess of Cambridge laughs as Patricia Hodge regales her with an anecdote after the show, as Sarah Hadland listens in while smiling warmly

Catherine, Duchess of Cambridge chats to Sarah Hadland, wearing a black and red floral dress and Sally Phillips wearing a pink faux-fur coat and pink hot pink patterned dress after the show

Catherine Duchess of Cambridge speaks to Patricia Hodge and Sarah Hadland after the 105th Royal Variety Performance Show at The London Palladium

Waving to the crowds as Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge greet enthusiastic guests and onlookers at the Royal Variety Show at London Palladium

Catherine, Duchess of Cambridge warmly shook hands with Miranda and other performers after the show in the London Palladium theatre

The Duchess of Cambridge, shakes hands with a young performer wearing a bright orange t-shirt from Circus Abyssinia after the show

Prince William, Duke of Cambridge looked dapper in black tie and Catherine, Duchess of Cambridge looked stunning in a crystal-embellished, blue gown as they joined a dazzling array of stars as they arrives at the Royal Variety Performance show.

Catherine, Duchess of Cambridge looked radiant as ever as she arrived at The Royal Variety Performance in London, wearing a floor length bespoke Jenny Packham dress.

Catherine, Duchess of Cambridge attends the Royal Variety Performance at the Palladium Theatre on November 24, 2017 in London, England.

Catherine, Duchess of Cambridge look radiant in rhinestones wearing a Jenny Packham Fall 2017 blue gown arrived at The Royal Variety Performance in London

The Duchess of Cambridge, who is four months pregnant, looked radiant in her heavily embellished Jenny Packham dress

Catherine, Duchess of Cambridge attends the Royal Variety Performance at the Palladium Theatre on November 24, 2017 in London, England.

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the Royal Variety Performance at the Palladium Theatre on November 24, 2017 in London, England.

Prince William, Duke of Cambridge looked dapper in black tie and Catherine, Duchess of Cambridge looked stunning in a crystal-embellished, blue gown as they left at the Royal Variety Performance show.

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the Royal Variety Performance at the Palladium Theatre on November 24, 2017 in London, England.

Catherine, Duchess of Cambridge who is four months pregnant, wearing a floor length bespoke Jenny Packham dress, paired with silver stilettos as she arrived at The Royal Variety Performance in London.

Catherine, Duchess of Cambridge attends the Royal Variety Performance at the Palladium Theatre on November 24, 2017 in London, England.

Catherine, Duchess of Cambridge in a glittering long sleeved gown, which sparkled and shone with each step she took, her silver stilettos were visible under the hem of her long blue dress, as she attends at The Royal Variety Performance in London