After a night of celebration, Prince William and Kate Middleton, now Catherine, Duchess of Cambridge, reportedly left Buckingham Palace by helicopter Saturday morning. Their honeymoon destination is still under wraps, but it is believed they will stay at a royal residence in Britain for a night or two before going to on a trip at a later date. Kenya and Jordan are the favorites among bookmakers. On Friday night, the newlyweds celebrated into the early hours with 300 friends and family. Kate wore a white evening gown by Sarah Burton, who designed her wedding dress, to the dinner and dance at Buckingham Palace. The reception was hosted by the Prince of Wales, and it is believed that Prince Harry made the best-man speech during the party and Michael Middleton made his father-of-the-bride address.