Prince William and Kate Middleton have officially announced their engagement! After dating on-and-off since 2001, Prince William finally put a ring on it and the royal wedding is expected to take place in the spring or summer of 2011. Prince William offered Kate Middleton the engagement ring of his late mother, Princess Diana, which is an oval sapphire surrounded by diamonds. Check out more photos of Prince William and Kate Middleton over the years!
Prince William and Kate Middleton, both 28, have enjoyed active holidays together over the years, including this skiing vacation at Klosters Ski Resort in Switzerland in 2008. Below, Prince William and Kate Middleton soaked up the sun while on a private boat in Ibiza, Spain.