An unprecedented peek into Queen Elizabeth II's royal wardrobe will take place this summer at Buckingham Palace. As part of the monarch's 90th birthday celebrations, the Royal Collection Trust announced early this week that visitors will be treated to a special exhibition of the queen's outfits, entitled "Fashioning a Reign: 90 Years of Style from The Queen's Wardrobe."

The exhibition will feature a wide range of clothes from the queen's childhood to the present day, including ball gowns and military regalia. It will also include the outfit designed by Angela Kelly and worn by the queen for the wedding of Prince William and Kate Middleton in 2011.

Around 150 outfits will be shown, with similar displays taking place at the Palace of Holyroodhouse and at Windsor Castle.