Kat looked very autumnal chic in her black skinny jeans, gray plaid blazer and black leather ankle boots. She carried a beautiful bouquet of white and pink roses.
William looked snug in a baby blue fleece jumper, jeans and chocolate brown suede shoes.
The dad of three was ready to throw a foam arrow as he joined a session with a group of kids. Let's hope he won the game!
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Kate tried her hand at playing tennis. She was serving up some chic sporty lewks as well as some tennis serves.
Coach Core is an charity that advocates sports apprenticeship for young adults who aren't in education or employment. The organization was established in 2012 following the Olympic Games in London.
Do you like the royal couples' looks for the day? Sound off in the comments below!