Jonathan Joseph "Jon" Heder (born October 26, 1977) is an American actor, filmmaker and screenwriter. He is best known for playing the title character of the 2004 comedy film Napoleon Dynamite. He has also acted in the films The Benchwarmers, School for Scoundrels, Blades of Glory, Mama's Boy, and When in Rome, and provided voice talents in the animated films Monster House and Surf's Up.
Heder was born in Fort Collins, Colorado, and is one of six children of family practice physician Dr. James Heder and his wife Helen. His paternal grandparents, Swedish immigrants, changed the family surname from "Olafsen" to "Heder". Heder has an identical twin brother, Dan, as well as an older sister and brother, Rachel and Doug, and two younger brothers, Adam and Matt. Heder is the nephew by marriage of former NFL running back and current WCAU sportscaster, Vai Sikahema.
Heder attended Walker Middle School in Salem, Oregon, and graduated from South Salem High School in 1996, where he was on the swim team and was a member of the Drama Association.