Kate Middleton Is the Epitome of a Princess at the Queen's Royal Reception With Prince William

Kate Middleton truly looked like a princess when she stepped out for Queen Elizabeth II's annual Diplomatic Reception with Prince William at Buckingham Palace on Tuesday night. Kate, who is currently pregnant with her third child, dazzled in a white gown, complete with the Cambridge Lover's Knot Tiara, which was given to the late Princess Diana as a wedding gift from Queen Elizabeth II back in 1981. The Diplomatic Reception is one of the largest parties the queen hosts every year and consists of the queen meeting with representatives from different countries. The lavish event also brought out Prince Charles and Camilla, Duchess of Cornwall.

Will and Kate's glamorous outing comes amid reports that Prince Harry has asked William to be his best man at his upcoming wedding to Meghan Markle. According to Us Weekly, "Harry has several close guy friends, but there's no way he would ask anyone but William to take on the top job." Prince George and Princess Charlotte are also reported to have roles during their special day.