William, Kate and Billie Jean King in Royal Box – KXXV

Kate Middleton and Prince William share a joke at the Wimbledon championships [Getty].

(Photo by Ian Walton/Getty Images) Britain’s Catherine, Duchess of Cambridge (L) and Prince William, Duke of Cambridge (R) take their seats in the royal box on centre court to watch the men’s singles quarter-final match between Britain’s Andy Murray and Canada’s Vasek Pospisil on day nine of the 2015 Wimbledon Championships at The All England Tennis Club in Wimbledon, southwest London, on July 8, 2015.

The couple watched the match from the Royal Box at Wimbledon’s Centre Court, which they shared with other spectators that included William’s aunt Sophie Wessex, Prince Albert of Monaco, and William’s cousin Zara Phillips, who is Queen Elizabeth II’s second-eldest grandchild.

David Beckham, wearing a blue blazer and white shirt, was also in the crowd with his son Romeo.

They also plan to upgrade the tennis court at their country home, Anmer Hall, to include an AstroTurf surface, copper beach border and surrounding oak trees.

Kate looked stunning in a cardinal red Cayla Long Dress from LK Bennett, while William sported a traditional and rather conservative suit and tie. Right after the match between Murry and Pospisil, Novak Djokovic vs. Marin Cilic were to battle it out for the semi-finals.

The royal couple stood and applauded after the Scot hit a victor to seal victory and set up a clash with seven-time champion Roger Federer on Friday. The twosome appeared to be enjoying themselves in their coordinating outfits as they rooted for Scottish player Andy Murray.

Kate smiled as she pushed her newborn past a crowd of well-wishers in a bespoke £5000 pram, while Prince William held on tightly to the duo’s infectiously cute toddler.