The couple who recently welcomed their third child, certainly showed that they are more in love than ever with the adorable display.
Kate looked stunning in a deep pink Alexander McQueen gown and Philip Treacy hat, while William looked dapper in a dark suit with a blue tie.
The couple were seated next to the Duke and Duchess of Sussex, Meghan and Harry.
The couples chatted animatedly before the event, displaying how close they all are.
Meghan looked chic in a navy outfit by Givenchy and a hat by Noel Stewart, while her handsome husband was wearing a dark suit and pale tie.
It is sure to be bringing back memories for Meghan and Harry, who only tied the knot at St George's Chapel earlier this year on May 19.