Kate Middleton & Royal Family Celebrate the Queen's 90th Birthday

Catherine, Duchess of Cambridge (aka Kate Middleton) celebrates with the Queen at the final evening of her 90th birthday celebration at Windsor on Sunday (May 15) in Windsor, England.

Also in attendance at the event, which featured horses from the Royal Windsor Horse Show, were Prince Harry, Prince Philip, Camilla, Duchess of Cornwall, and more. Prince William (not pictured) was also there to celebrate his grandmother.

FYI: Kate is wearing a Zara coat and a Dolce&Gabbana dress.

10+ pictures inside of Kate Middleton and more of the royal family celebrating the Queen…