Though the story of how Kate Middleton met Prince William is now royal folklore, it bears repeating: The art history majors met while living in St. Salvator's Hall at St. Andrews University in Scotland. As Middleton helped her future husband choose a different major, their romance grew; Prince William famously shelled out $200 to watch Kate walk in a campus charity fashion show. Fast forward four years, and the best friends and roommates posed for this cozy portrait on graduation day. Though they had been dating since roughly 2002, this picture is one of the first public photos of the college sweethearts — they had a privacy agreement with the press during their school years. Following their graduation ceremony, Will and Kate hosted a lunch for Prince Charles, his wife Camilla Parker Bowles, and Middleton's parents. This big moment was the first spark that became the royal couple flame.