Pippa Middleton, the sporty young sister of Britain's Duchess of Cambridge, made an appearance Wednesday at Wimbledon on the arm of her sometime boyfriend, Alex Loudon.

Middleton wore a cao-sleeved, reddish dress, tan flats, and sunglasses, while Loudon sported light trousters and shirt, topped off with a striped blue tie and navy blazer. Pippa's dress appeared to be the same one she wore the previous day, sparking rumors that she did not return home overnight, the New York Post reported.

Her parents also attended the tennis tournament Wednesday.

The Duke and Duchess of Cambridge - who will depart Thursday for their first overseas tour to Canada and California - attended the tennis championships Monday, sitting in the royal box as they cheered British hopeful Andy Murray on to victory against France's Richard Gasquet.