Kate Middleton steps out in stunning, stylish blue gown for charity gala

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The Duchess of Cambridge has done it again. To attend the SportsAid Gala Thursday night, the royal mother of George and Charlotte donned an equally royal blue gown, stealing the show in that effortless way she always does.

The shoulder cut-out dress was designed by Roland Mouret, who has designed several other knockout numbers the Duchess has worn in the past. The designer most recently outfitted Heidi Klum for the annual CFDA Fashion Awards Monday night.

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Kate Middleton in Roland Mouret gown
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Kate Middleton steps out in stunning, stylish blue gown for charity gala
LONDON, UNITED KINGDOM - JUNE 09: Catherine, Duchess of Cambridge attends SportsAid's 40th anniversary dinner on June 9, 2016 in London, England. On arrival, The Duchess will met SportsAid ambassadors and young athletes who will be competing in the Rio 2016 Olympics at a pre-dinner reception, as well as some of the charity's key supporters. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - JUNE 09: Catherine, Duchess of Cambridge attends SportsAid's 40th anniversary dinner on June 9, 2016 in London, England. On arrival, The Duchess will met SportsAid ambassadors and young athletes who will be competing in the Rio 2016 Olympics at a pre-dinner reception, as well as some of the charity's key supporters. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - JUNE 09: Catherine, Duchess of Cambridge attends SportsAid's 40th anniversary dinner on June 9, 2016 in London, England. On arrival, The Duchess will met SportsAid ambassadors and young athletes who will be competing in the Rio 2016 Olympics at a pre-dinner reception, as well as some of the charity's key supporters. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - JUNE 09: Catherine, Duchess of Cambridge attends SportsAid's 40th anniversary dinner on June 9, 2016 in London, England. On arrival, The Duchess will met SportsAid ambassadors and young athletes who will be competing in the Rio 2016 Olympics at a pre-dinner reception, as well as some of the charity's key supporters. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - JUNE 09: Catherine, Duchess of Cambridge attends SportsAid's 40th anniversary dinner on June 9, 2016 in London, England. On arrival, The Duchess will met SportsAid ambassadors and young athletes who will be competing in the Rio 2016 Olympics at a pre-dinner reception, as well as some of the charity's key supporters. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - JUNE 09: Catherine, Duchess of Cambridge attends SportsAid's 40th anniversary dinner on June 9, 2016 in London, England. On arrival, The Duchess will met SportsAid ambassadors and young athletes who will be competing in the Rio 2016 Olympics at a pre-dinner reception, as well as some of the charity's key supporters. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - JUNE 09: Catherine, Duchess of Cambridge attends SportsAid's 40th anniversary dinner on June 9, 2016 in London, England. On arrival, The Duchess will met SportsAid ambassadors and young athletes who will be competing in the Rio 2016 Olympics at a pre-dinner reception, as well as some of the charity's key supporters. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - JUNE 09: Catherine, Duchess of Cambridge attends SportsAid's 40th anniversary dinner on June 9, 2016 in London, England. On arrival, The Duchess will met SportsAid ambassadors and young athletes who will be competing in the Rio 2016 Olympics at a pre-dinner reception, as well as some of the charity's key supporters. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - JUNE 09: Catherine, Duchess of Cambridge attends SportsAid's 40th anniversary dinner on June 9, 2016 in London, England. On arrival, The Duchess will met SportsAid ambassadors and young athletes who will be competing in the Rio 2016 Olympics at a pre-dinner reception, as well as some of the charity's key supporters. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - JUNE 09: Catherine, Duchess of Cambridge attends SportsAid's 40th anniversary dinner on June 9, 2016 in London, England. On arrival, The Duchess will met SportsAid ambassadors and young athletes who will be competing in the Rio 2016 Olympics at a pre-dinner reception, as well as some of the charity's key supporters. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - JUNE 09: Catherine, Duchess of Cambridge attends SportsAid's 40th anniversary dinner on June 9, 2016 in London, England. On arrival, The Duchess will met SportsAid ambassadors and young athletes who will be competing in the Rio 2016 Olympics at a pre-dinner reception, as well as some of the charity's key supporters. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
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The charity provides financial support and recognition to young British athletes during the early stages of their careers, and the British royal has been a patron of it since 2013.

Since having been British Vogue's cover girl in May, the Duchess has had a whirlwind of iconic fashion moments, from the recent garden party in which she dazzled in Alexander McQueen, to her chic Banana Republic skirt at an earlier public appearance and now this.

See photos of Kate's outfit at the recent garden party:

19 PHOTOS
Kate Middleton in McQueen for Garden Party
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Kate Middleton steps out in stunning, stylish blue gown for charity gala

Britain's Catherine, Duchess of Cambridge and Britain's Prince William, Duke of Cambridge greet guests attending a garden party at Buckingham Palace in London on May 24, 2016.

(Photo by DAN KITWOOD/AFP/Getty Images)

Catherine, Duchess of Cambridge greets guests attending a garden party at Buckingham Palace on May 24, 2016 in London, England.

(Photo by Dan Kitwood/Getty Images)

The Duchess of Cambridge talks to guests during a garden party at Buckingham Palace in London.
The Duchess of Cambridge attends a garden party at Buckingham Palace in London.

Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince Philip, Duke of Edinburgh and Queen Elizabeth II arrive to greet guests attending a garden party at Buckingham Palace on May 24, 2016 in London, England.

(Photo by Dan Kitwood - WPA Pool/Getty Images)

Catherine, Duchess of Cambridge greets guests attending a garden party at Buckingham Palace on May 24, 2016 in London, England.

(Photo by Dan Kitwood/Getty Images)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive to greet guests attending a garden party at Buckingham Palace on May 24, 2016 in London, England.

(Photo by Dan Kitwood - WPA Pool/Getty Images)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive to greet guests attending a garden party at Buckingham Palace on May 24, 2016 in London, England.

(Photo by Dan Kitwood - WPA Pool/Getty Images)

Britain's Catherine, Duchess of Cambridge, smiles as she greets guests attending a garden party at Buckingham Palace in London on May 24, 2016. 

(Photo credit should read DAN KITWOOD/AFP/Getty Images)

Britain's Prince William, Duke of Cambridge, Britain's Catherine, Duchess of Cambridge, Britain's Prince Philip, Duke of Edinburgh and Britain's Queen Elizabeth II arrive to greet guests attending a garden party at Buckingham Palace in London on May 24, 2016. 

(Photo credit should read DAN KITWOOD/AFP/Getty Images)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge greet guests attending a garden party at Buckingham Palace on May 24, 2016 in London, England.

(Photo by Dan Kitwood/Getty Images)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge greet guests attending a garden party at Buckingham Palace on May 24, 2016 in London, England.

(Photo by Dan Kitwood/Getty Images)

Catherine, Duchess of Cambridge greets guests attending a garden party at Buckingham Palace on May 24, 2016 in London, England.

(Photo by Dan Kitwood/Getty Images)

Catherine, Duchess of Cambridge and HM Queen Elizabeth II greet guests attending a garden party at Buckingham Palace on May 24, 2016 in London, England.

(Photo by Dan Kitwood/Getty Images)

Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince Philip, Duke of Edinburgh and Queen Elizabeth II arrive to greet guests attending a garden party at Buckingham Palace on May 24, 2016 in London, England.

(Photo by Dan Kitwood/Getty Images)

Britain's Catherine, Duchess of Cambridge, smiles as she greets guests attending a garden party at Buckingham Palace in London on May 24, 2016.

(Photo credit should read DAN KITWOOD/AFP/Getty Images)

The Duchess of Cambridge talks to guests during a garden party at Buckingham Palace in London.
The Duke and Duchess of Cambridge, Queen Elizabeth II and the Duke of Edinburgh attend a garden party at Buckingham Palace in London.
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