Yep, Charles dated Princess Diana’s older sister Lady Sarah Spencer in 1977, but she just wasn’t that into him. As she told a magazine, “I’m not in love with Prince Charles. I’m a whirlwind sort of lady as opposed to a person who goes in for slow-developing courtships. I can assure you that if there was to be any engagement between Prince Charles and myself, then it would have happened by now. I wouldn’t marry anyone I didn’t love, whether it was the dustman or the King of England.”