Jonathan Francis "Jon" Gries (born June 17, 1957 in Glendale, California) is an American actor, writer and director. He is also known under names Jon Francis and Jonathan Gries for being credited under. He is known for playing Uncle Rico ("Back in '82") in the movie Napoleon Dynamite and is also known for his role as Lazlo Hollyfeld in the 1985 comedy film Real Genius. Gries played the role of a terrorist in season two of the hit show 24. Gries also played a werewolf henchman in the horror/comedy sequel Fright Night II (he also played a werewolf in The Monster Squad). His most notable television roles are Broots on the NBC series The Pretender and Shawn on the FOX sitcom Martin during the first two seasons.

He is the son of late writer, director, producer, and Emmy-winner Tom Gries. He does not drink milk and eats very little red meat. And while he chewed pieces, he refused to swallow the steaks his character Uncle Rico eats in Napoleon Dynamite.

Gries appeared in the Seinfeld episode The Beard as a bum whom Kramer gives Chinese leftovers to but requests to get the Tupperware back from.

He also recently played the role of Roger Linus, the father of Ben Linus in the Lost episode The Man Behind the Curtain. Interestingly, Michael Emerson, who plays Ben, is several years older than Gries.