The Duke posted a video to his official Twitter account in which he and Charlotte shared their support for the Lionesses.
“We both want to wish the lionesses the best of luck tonight, you’ve done amazingly well in the competition and we’re rooting for you all the way!” William exclaimed.
Then Charlotte chipped in: “Good luck, I hope you win. Bye!”
Prince William, a lifelong Aston Villa fan, has previously revealed that both Prince George, nine, and Princess Charlotte, seven, are big football fans.
Just last month he met members of the England squad at their St George’s Park training ground in Burton-on-Trent, where he mentioned Charlotte was “really good in goal”.