Prince William and Kate Middleton continued their jam-packed weekend with another royal duty in England this morning. The Duke and Duchess of Cambridge participated in the annual Garter Service at St. George's Chapel, where William dressed up in a traditional outfit including a robe, collar, and other accessories to become the 1,000th Knight of the Garter. The newlyweds maintained quite a busy schedule over the last few days, kicking off festivities with the Ark dinner and then stepping out again for the Trooping the Colour to celebrate the Queen's birthday. Kate then attended a friend's nuptials with her sister Pippa and met up with William the next day for church services with his family. The Duchess might be in the spotlight for her many official activities, but her sister is also making headlines since Pippa is reportedly single after a split from longtime boyfriend Alex Loudon.