Johnathan Lipnicki, of Jerry Maguire and Stuart Little fame, is all grown up and looking decidedly fit.

The child star made his film debut in 1996, playing the son of Renee Zellweger. In 1999 he played a boy whose family adopted a talking mouse.  He reprised the role in the 2002 Stuart Little sequel.

JL turned 21 several weeks ago and is working in films again after a six year hiatus.  For the Love of Money is in post-production and another flick, Tag, is being filmed now.  It is a dark thriller about a gang of homeless kids, with Lipnicki portraying the brains of the operation.

How did he become a gym rat?  He admits, “The more results I saw, the more dedicated I became.  It is such a great feeling to see your hard work pay off.  I work free-weights and do circuit training 4-5 times a week.  I also train in Brazilian Ju Jitsu several times a week.”

Check out another Then and Now photo below:

Photos:  WENN, Twitter, Facebook-Jonathan Lipnicki, Ryan Caliendo

Filed under: Celebrities