Curator Caroline de Guitar, poses for photographers next to Britain's Queen Elizabeth's green ensemble worn for Trooping the Colour in 2016 marking her official 90th birthday, ahead of the opening of an exhibition entitled “Fashioning a Reign: 90 Years of Style from the Queen's Wardrobe”, at Buckingham Palace, in London, Britain July 21, 2016. (Photo by Peter Nicholls/Reuters)





A woman adjusts the Mantle of the Order of the British Empire at an exhibition at Buckingham Palace in London, Thursday, July 21, 2016. In celebration of Her Majesty's 90th birthday this year, visitors to the Summer Opening of the State Rooms at Buckingham Palace will enjoy an unprecedented display of The Queen's outfits, from childhood to the present day, in the special exhibition Fashioning a Reign: 90 Years of Style from The Queen's Wardrobe. (Photo by Frank Augstein/AP Photo)





A woman adjusts dresses of Britain's Queen Elizabeth at an exhibition at Buckingham Palace in London, Thursday, July 21, 2016. (Photo by Frank Augstein/AP Photo)





Dresses of Britain's Queen Elizabeth are on display at an exhibition at Buckingham Palace in London, Thursday, July 21, 2016. (Photo by Frank Augstein/AP Photo)





A woman adjusts evening dresses of Britain's Queen Elizabeth at an exhibition at Buckingham Palace in London, Thursday, July 21, 2016. (Photo by Frank Augstein/AP Photo)





Curator Caroline de Guitar poses for photographers next to the the dress worn by Britain's Queen Elizabeth, when she appeared with “James Bond, 007” in a short film during the opening ceremony of the London 2012 Olympic Games, ahead of the opening of an exhibition entitled 'Fashioning a Reign: 90 Years of Style from the Queen's Wardrobe', at Buckingham Palace, in London, Britain July 21, 2016. (Photo by Peter Nicholls/Reuters)





A woman adjusts evening dresses of Britain's Queen Elizabeth at an exhibition at Buckingham Palace in London, Thursday, July 21, 2016. (Photo by Frank Augstein/AP Photo)





A woman adjusts Britain's Queen Elizabeth wedding dress at an exhibition at Buckingham Palace in London, Thursday, July 21, 2016. (Photo by Frank Augstein/AP Photo)





A woman adjusts evening dresses of Britain's Queen Elizabeth at an exhibition at Buckingham Palace in London, Thursday, July 21, 2016. (Photo by Frank Augstein/AP Photo)





A woman looks at Britain's Queen Elizabeth's hats at an exhibition at Buckingham Palace in London, Thursday, July 21, 2016. (Photo by Frank Augstein/AP Photo)





A member of the Royal Collection Trust, poses for photographers next to Britain's Queen Elizabeth's “Mantle of The Order of The British Empire” robe, ahead of the opening of an exhibition entitled '“ashioning a Reign: 90 Years of Style from the Queen's Wardrobe”, at Buckingham Palace, in London, Britain July 21, 2016. (Photo by Peter Nicholls/Reuters)