Prince Albert II and Princess Charlene of Monaco Attend the 70th Annual Red Cross Gala at the Monte-Carlo Sporting Club on July 27, 2018 in Monaco

Princess Charlene of Monaco and Prince Albert II of Monaco attend the 70th Monaco Red Cross Ball Gala on July 27, 2018, in Monte-Carlo, Monaco.

Princess Charlene of Monaco attends the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Princess Charlene of Monaco attends the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Prince Albert II of Monaco and Princess Charlene of Monaco attend the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Princess Charlene of Monaco and Prince Albert II of Monaco attend the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Princess Charlene of Monaco attends the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Princess Charlene of Monaco, bag detail, attends the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Prince Albert II of Monaco and Princess Charlene of Monaco attend the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Prince Albert II of Monaco and Princess Charlene of Monaco attend the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Princess Charlene of Monaco attends the 70th Monaco Red Cross Ball Gala  2018 in Monte-Carlo, Monaco. (Photo by Stephane Cardinale

Prince Albert II of Monaco and Princess Charlene of Monaco was given a bouquet of flowers as they attend the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Princess Charlene of Monaco and Prince Albert II of Monaco attend the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Princess Charlene of Monaco attends the 70th Monaco Red Cross Ball Gala  2018 in Monte-Carlo, Monaco. (Photo by Stephane Cardinale

Glamorous Princess Charlene of Monaco holds crimson blooms for her stunning entrance to 70th Monaco Red Cross Ball 2018 with husband Prince Albert II

Prince Albert II of Monaco and Princess Charlene of Monaco attend the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Prince Albert II of Monaco and Princess Charlene of Monaco attend the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Prince Albert II of Monaco and Princess Charlene of Monaco was given a bouquet of flowers as they attend the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Prince Albert II of Monaco and Princess Charlene of Monaco attend the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Prince Albert II of Monaco and Princess Charlene of Monaco attend the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Princess Charlene of Monaco attends the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Princess Charlene of Monaco attends the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Princess Charlene of Monaco waves during the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Prince Albert II of Monaco and Princess Charlene of Monaco attend the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Princess Charlene of Monaco waves during the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Glamorous Princess Charlene of Monaco in her stunning entrance to 70th Monaco Red Cross Ball 2018 in Monte-Carlo, Monaco

Princess Charlene of Monaco stunning as she attends the 70th Monaco Red Cross Ball Gala 2018, a lively event which raises funds for the Red Cross

Princess Charlene of Monaco holds a red posy at the star-studded charity fundraising event, which is held every year in Monte-Carlo, Monaco

Princess Charlene of Monaco attend the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco

Princess Charlene of Monaco attend the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco

Princess Charlene of Monaco attends the 70th Monaco Red Cross Ball Gala, a lively event which raises funds for the Red Cross

Princess Charlene of Monaco at the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo

Princess Charlene of Monaco attends the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Princess Charlene of Monaco and Prince Albert II of Monaco pose during the dance at the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Princess Charlene of Monaco (R) and Prince Albert II of Monaco pose during the dance at the 70th Monaco Red Cross Ball Gala 2018 in Monte-Carlo, Monaco.

Queen Letizia Of Spain Visits The International School Of Music 'Fundacion Princesa de Asturias' on July 26, 2018 in Oviedo, Spain.

Queen Letizia of Spain looked sensational in a Hugo Boss denim dress. With its button-up detail and belted waist, as she attended an art lecture in Oviedo, Asturias, in northwest Spain

Queen Letizia of Spain opted for an elegant denim shirt dress by Hugo Boss with slingbacks, waving as she attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain sat alongside president Javier Fernandez (third left) and foundation president Luis Fernandez Vega (left) at the lecture offered by Spanish stage manager Emilio Sagi

Queen Letizia of Spain looks sharp in a £179 Hugo Boss dress teamed it with a slingbacks shoes, and wore her hair in a sleek side parting as she attends a music lecture in Asturias

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain continued to put on a stylish display as she attended an art lecture in Oviedo, Asturias, in northwest Spain

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation 2018 at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation 2018 at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain opted for an elegant Stretch-denim Hugo Boss dress with bell cuffs and ribbon belt as she attended an art lecture in Oviedo, Asturias, Spain

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation 2018 at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation 2018 at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation 2018 at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain (C) attends the International Music School Summer Courses 2018 by Princess of Asturias Foundation at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses 2018 by Princess of Asturias Foundation at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses 2018 by Princess of Asturias Foundation at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain (R) attends the International Music School Summer Courses 2018 by Princess of Asturias Foundation at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain opted for flattering style denim shirt dress with slingbacks shoes, waving as she attended an art lecture in Oviedo, Asturias, in northwest Spain

Queen Letizia of Spain attends the International Music School Summer Courses 2018 by Princess of Asturias Foundation at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain looked sensational in a Hugo Boss denim dress. The long-sleeved dress was cinched in at the waist by a wide belt and fell just below the knee. She teamed it with a tan clutch and a pair of slingbacks shoes While attending an art lecture in north-west Spain

Queen Letizia of Spain wore elegant denim dress to the lecture in Asturias, Spain

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain (R) attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain looks sharp in a Hugo Boss dress as she attends a music lecture in Asturias

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain (C) attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain looked sensational in a Hugo Boss denim dress. With its button-up detail and belted waist teamed with a pair of slingbacks shoes, as she attended an art lecture in Oviedo, Asturias, in northwest Spain

Queen Letizia of Spain attends the International Music School Summer Courses 2018 by Princess of Asturias Foundation at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain looked sensational in a Hugo Boss denim dress. With its button-up detail and belted waist teamed with a pair of slingbacks shoes, as she attended an art lecture in Oviedo, Asturias, in northwest Spain

Queen Letizia of Spain Spain looks sharp in denim shirt dress by Hugo Boss with a pair of slingbacks shoes, teamed with a tan clutch, waving as she attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain wore elegant denim dress to the lecture in Asturias, Spain

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation 2018 at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation 2018 at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation 2018 at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation at the Prince Felipe Auditorium on July 26, 2018, in Oviedo, Spain.

Queen Letizia of Spain continued to put on an stylish display as she attended an arts lecture in Oviedo, Asturias, in northwest Spain

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation 2018 at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain attends the International Music School Summer Courses by Princess of Asturias Foundation 2018 at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain Spain looks sharp in Stretch-denim dress with bell cuffs and ribbon belt by Hugo Boss with a pair of slingbacks shoes, waving as she attended an arts lecture in Oviedo, Asturias, northwest Spain

Queen Letizia of Spain (C) attends the International Music School Summer Courses 2018 by Princess of Asturias Foundation at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain (R) attends the International Music School Summer Courses 2018 by Princess of Asturias Foundation at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain looks sharp in a £179 Hugo Boss dress as she attends a music lecture in Asturias

Queen Letizia of Spain attends the International Music School Summer Courses 2018 by Princess of Asturias Foundation at the Prince Felipe Auditorium in Oviedo, Spain.

Queen Letizia of Spain looked sensational in a Hugo Boss denim dress. With its button-up detail and belted waist teamed with a pair of slingbacks shoes, as she attended an art lecture in Oviedo, Asturias, in northwest Spain

Queen Letizia of Spain looked sensational in a Hugo Boss denim dress. The long-sleeved dress was cinched in at the waist by a wide belt and fell just below the knee. She teamed it with a tan clutch and a pair of slingbacks shoes While attending an art lecture in north-west Spain

Queen Letizia of Spain wore elegant denim dress to the lecture in Asturias, Spain