William Uniform Saluting

The Young Prince William

On his 36th birthday, a fun flashback.

They might reign over parades, horse races, and other official events, but even royals can't stop the march of time: Prince William, the Duke of Cambridge and second in line to the British throne, is celebrating his 36th birthday today (June 21). He's married now with three young children of his own, but we'll always remember Princess Diana's older son from his days as a handsome little prince...

MOTHER KNOWS BEST Tim Graham/Tim Graham/Getty Images MOTHER KNOWS BEST Doing a jigsaw puzzle with Diana, 1985. CATCH ME IF YOU CAN Tim Graham/Tim Graham/Getty Images CATCH ME IF YOU CAN His brother's keeper, 1986.

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BIG BROTHER Tim Graham/Tim Graham/Getty Images BIG BROTHER Overseeing Harry's first steps at Kensington Palace, 1985. LITTLE PRINCE, LITTLE PONY Tim Graham/Tim Graham/Getty Images LITTLE PRINCE, LITTLE PONY An equestrian in the making, 1986. CHILD'S PLAY Julian Parker/UK Press via Getty Images CHILD'S PLAY Watching Trooping the Colour, 1989. BOY RACER Anwar Hussein/Getty Images BOY RACER A day of go-karting, 1988. THAT SMILE Tim Graham/Tim Graham/Getty Images THAT SMILE Happy for his great-grandmother's birthday, 1995. JUST LIKE MOM Mark Cuthbert/UK Press via Getty Images JUST LIKE MOM Looking very much like Diana on the day he learned to drive, 1999. ALL GROWN UP Ken Goff/The LIFE Images Collection/Getty Images ALL GROWN UP Emerging as a teen heartthrob, 1999. WORKING LIFE Chris Jackson/Getty Images WORKING LIFE In the Royal Navy, 2008. FUTURE WIFE Handout FUTURE WIFE Graduating from St Andrew's University with the former Kate Middleton, 2005.

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