'Jerry Maguire' Child Actor Turns 21

Jonathan Lipnicki, the breakout child star of Jerry Maguire opposite Tom Cruise, celebrated his 21st birthday in Las Vegas last weekend:

That cute six-year-old is all grown up -- and mature enough to smile even though his name is misspelled on his own birthday cake.

On Friday, Lipnicki tweeted: "Thanks to everyone who is wishing me a happy bday! It means so much!"

As a child actor, Lipnicki also starred in Stuart Little and Stuart Little 2, along with other TV and film appearances. He will also be seen in the new movies For the Love of Money later this year and Tag in 2012.

-- Daniel Lehman