Kate Middleton Wears Princess Diana's Tiara to Queen Elizabeth's Diplomatic Reception

Kate Middleton is paying tribute to her late mother-in-law.

The 37-year-old Duchess of Cambridge wore Princess Diana‘s tiara to Queen Elizabeth‘s Diplomatic Reception on Wednesday evening (December 11) at Buckingham Palace in London, England.

PHOTOS: Check out the latest pics of Kate Middleton

Queen Elizabeth gifted Princess Diana with the tiara as a wedding present when she married Prince Charles in 1981. Princess Diana wore the tiara on several occasions, including in 1985 on an official visit to Washington with Prince Charles.

Fellow members of the Royal Family at the party included Kate‘s husband Prince William along with Prince Charles and wife Camilla, Duchess of Cornwall.

If you missed it, a Palace spokesperson recently addressed rumors that Queen Elizabeth was going to retire from the throne when she turned 95.

FYI: Kate is wearing an Alexander McQueen dress.

10+ pictures inside of the Royal Family at the event…