It's the "wedding of the new millennium": Prince William and Kate Middleton will marry at London's Westminster Abbey on April 29.

The future king of the United Kingdom explained in 'William & Kate: Inside the Royal Wedding' (Sun., 10PM ET on TLC) that he was interested in her from the first moment he saw her. "But we ended up being friends for a while and that was a good sort of foundation." He added dryly, "I'm obviously extremely funny, and she loves that."

For her part, Kate told a high school friend that she'd met "this really nice boy" at the University of St. Andrews. At the time, she would only reveal his name to be "Willie".