Earlier this week, the Duke and Duchess of Cambridge spent the day at Wimbeldon. Today, Kate's sexy younger sister Pippa took Centre Court, arriving in a tomato red Hobbs NW3 Wyldes dress with her boyfriend Alex Loudon, amidst rumors that the couple split up. Middleton has been tied to a number of prospective replacement boyfriends, most notably Prince Harry.

The seemingly happy couple was joined by Middleton's parents.