Actress Keira Knightley (Pirates of the Caribbean) is 22.

Actor Leonard Nimoy is 76.
Actor James Caan is 67.
Singer Diana Ross is 63.
Singer Steven Tyler of Aerosmith is 59.
Singer-actress Vicki Lawrence is 58.
Singer Teddy Pendergrass is 57.
Actor Martin Short is 57.
Talk show host Leeza Gibbons is 50.
Actress Jennifer Grey is 47.
Actor Michael Imperioli (The Sopranos) is 41.
Guitarist James Iha (Smashing Pumpkins) is 39.
Country singer Kenny Chesney is 39.
Actor T.R. Knight (Grey's Anatomy) is 34.
Rapper Juvenile is 32.
Actress Amy Smart (Felicity) is 31.
Rapper J-Kwon is 21.

NOT-SO-FUN FACT: On this day in 1999, a jury in Michigan finds Dr. Jack Kevorkian guilty of second-degree murder for administering a lethal injection to a terminally ill man.