Chris Pizzello / Invision/AP 1 / 6
Chris Pizzello / Invision/AP 1 / 6

Jonathan Lipnicki -- better known as Tom Cruise's little buddy in "Jerry Maguire" -- turned 21 on Saturday.

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According to People magazine, Lipnicki celebrated the big birthday in Las Vegas with his parents, his sister, an aunt, three cousins and an assortment of friends.

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The Lipnickis celebrated Friday with a dinner at Tao before arriving a little after midnight at the Surrender Nightclub at the Encore, where he enjoyed vodka cocktails with his buddies late into the night.

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The party continued Saturday with a cake and dinner at Lavo.