Cape Town - Prince William was caught up in the emotion following England's historic Soccer World Cup Round of 16 penalty shootout victory over Colombia on Tuesday.
READ: Colombia coach deliberately elbow England player - shocking!
England beat their South American opponents 4-3 on penalties after the sides were deadlocked at 1-1 after 90 minutes - and extra-time.
The penalty victory was England's first in four attempts at a World Cup.
Via the official Kensington Palace Twitter page, Prince William tweeted he "couldn't be prouder" of England and added that the "whole country is right behind you for Saturday".
England will play Sweden in the quarter-finals on Saturday at 16:00 (SA time).
I couldn’t be prouder of @england - a victory in a penalty shootout! You have well and truly earned your place in the final eight of the #worldcup and you should know the whole country is right behind you for Saturday! Come on England! W
— Kensington Palace (@KensingtonRoyal) July 3, 2018