Tom Cruise played an immortal being in "Interview With the Vampire" -- and there's a slim possibility he may actually be one in real life. How else do you explain his perfect face and its lack of any discernible signs of aging? The A-list actor, who turns 51 on July 3, has barely aged since he first hit the silver screen back in 1981. Need proof? Just take a look back at how he's changed -- or not! -- since he made his Hollywood debut.