Jonathan Lipnicki was adorable as Renee Zellweger's know-it-all son in Tom Cruise's 1996 smash Jerry Maguire -- but those days are long gone.

The actor, now 21, stunned fans on Thursday when pictures of his incredibly chiseled, buff body surfaced online. Lipnicki began beefing up for his role in For the Love of Money, and though his shirtless scene was cut, "I kind of became a gym rat."

To see his picture, CLICK HERE