Princess Kate reacting after Prince William used a speech at a Windsor Castle concert in Berkshire, England, to make a Lionel Richie joke has caught attention on TikTok.

The Prince of Wales spoke to thousands gathered at the Coronation Concert on May 7, 2023, the day after his father King Charles III was crowned at Westminster Abbey in London.

Lionel Richie was among the acts, and William riffed off the singer’s 1983 hit single “All Night Long.”

“Good evening, your Majesties; good evening, Windsor,” William said. “A huge thank-you to everyone for making this such a special evening.

Main: Prince William grins on stage during the Coronation Concert, giving a speech in which he made a Lionel Richie joke. Inset left: Kate Middleton is seen reacting. The princess was caught laughing on camera,… Stefan Rousseau-Pool/Getty Images and Yui Mok – WPA Pool/Getty Images

“I want to say a few words about my father and why I believe this weekend is so important. But don’t worry; unlike Lionel, I won’t go on ‘all night long,'” the prince added.

The gag earned a laugh from Kate who was sat in the audience alongside Charles, Queen Camilla, and her children Prince George and Princess Charlotte.

A clip of the moment on @milfssb was liked more than 11,500 times and viewed over 67,700 times on TikTok after it was posted with the message: “LMFAO [Laughing my f****** a** off] i love her she jst went ‘oh!'”

One reply read, “that first clip… she knew exactly what he was doing,” while another read: “She knew what he was tryna sayyyy.”

After a light-hearted start, William’s speech pivoted to a more-serious message, and he said: “As my grandmother [Queen Elizabeth II, who died in September 2022] said when she was crowned, coronations are a declaration of our hopes for the future. I know she’s up there, fondly keeping an eye on us. She would be a very proud mother.

“For all that celebrations are magnificent, at the heart of the pageantry is a simple message: Service,” the prince added.

“My father’s first words of entering Westminster Abbey yesterday were a pledge of service.

“It was a pledge to continue to serve, because, for over 50 years, in every corner of the U.K., across the Commonwealth, and around the world, he has dedicated himself to serve others—both current and future generations and those whose memory has not been neglected.”