Olympics 2012 Celebrity Fan Spottings: See the Photos

The royal couple tucked under an umbrella to watch Will's cousin, Zara, win a silver medal in equestrian Eventing.

The younger Prince of Wales (in an Adidas polo) and Princess Eugenie were also spotted in the stands at Zara's Eventing competition.

The former Olympic swimmer congratulated a fellow South African swimmer on a race well done!

The model and the snowboarder smiled with Michael Phelps's family as everyone watched the Olympic swimmer race to win his 19th medal.

The actress slipped into a striped tee to root for her husband, tennis player Andy Roddick.

The basketball player wore an Americana fleece to watch a volleyball match between the United States and Brazil.

The handsome Brits were all smiles in dapper suits as they stood up and cheered on their country's Olympic soccer team at the game against the United Arab Emirates on Sunday.

The Duke of Cambridge and his Duchess (in Christopher Kane) looked on at the Danny Boyle-directed Opening Ceremony spectacle last Friday, which included a James Bond airplane scene and a reading from JK Rowling.

The First Lady of the United States (in BCBG Max Azria) joined gold medal swimmer Summer Sanders at a swimming race in London this weekend.

The Princess of Monaco (and former competitive swimmer) couldn't contain her excitement when South Africa's Cameron van der Burgh took the lead at the men's 100m breaststroke race.