Prince William and his mother, the late Princess Diana

25 of 64: Prince William gets a handshake from Frederika Blair-Turner, the headmistress of Wetherby School in Notting Hill as his little brother Prince Harry, 4, smiles, clutching his schoolbag on Sept. 11, 1989. Their mother, Princess Diana of Wales, looks on. It was Harry's first day of school but he should have started the previous Thursday. A viral infection kept him at home. (AP Photo / Gillian Allen)