Prince William took a time-out and headed to the soccer field with some friends in London last night. The newlywed is back home from his 10-day honeymoon with Kate Middleton in the Seychelles, where they enjoyed the local wildlife and stayed in a luxurious private suite. After William's casual sporting match yesterday, the couple kicked off their royal duties as the Duke and Duchess of Cambridge this morning by welcoming President Obama and Michelle Obama at Buckingham Palace. The Obamas will spend two days in London and appear at an official royal banquet with the Queen and Prince Philip this evening before returning to the States. William and Kate have their own trip to America in the works and reportedly chatted about their plans with the Obamas today. They will head to California on July 8 for a three-day visit, though details on their destination and itinerary have yet to be released.