THEN: Born the son of actors, Rooney made his stage debut at 15-months-old and his screen debut at age 6. This means that by 1981, the 61-year-old actor had been in the movie business for 55 years already, appearing in such beloved pictures as 'Breakfast at Tiffany's' and 'National Velvet.'

NOW: At 92, Rooney has a whopping 336 film and television credits, and is still performing. He made a cameo appearance in 2011's 'The Muppets,' co-starred in the 2012 thriller 'The Woods,' and is expected to hit screens in 2013 as part of the adventure film 'The Devil in the Fog.'