Jonathan Kolia "Jon" Favreau (born October 19, 1966) is an American actor, screenwriter and film director. He is best known for appearing in films including Rudy and Swingers, as well as directing such films as Elf and Iron Man.

Favreau was born in Flushing, New York, the son of Madeleine, a schoolteacher who died of leukemia in 1978, and Charles Favreau, a special education teacher. His father was an Italian American Catholic and his mother was Jewish. He graduated from the Bronx High School of Science in 1984 and attended Queens College from 1984 to 1987, before dropping out. He briefly worked for Bear Stearns on Wall Street before returning to Queens College for a semester in early 1988. He dropped out of college for good (a few credits shy of completing his degree), and in the summer of 1988, moved to Chicago to pursue a career in comedy. He performed at several Chicago improvisational theaters, including the ImprovOlympic and the Improv Institute.

While in Chicago, Favreau landed his first film role alongside Sean Astin as the pudgy tutor D-Bob in the classic sleeper hit Rudy (1993). Favreau met Vince Vaughn—who also played a small role in this film—during shooting. The next year, he appeared in the college film PCU alongside Jeremy Piven, and also stepped into the world of television in the 1994 episode of Seinfeld titled "The Fire" as Eric the Clown. He then moved to Los Angeles, where he made his breakthrough in 1996 as an actor-screenwriter with the film Swingers, which was Vaughn's breakthrough role as the glib and extremely confident Trent Walker, a perfect foil to Favreau's heartbroken Mike Peters. In 1997 he appeared on the popular TV sitcom Friends portraying Pete Becker, whom Monica dates for several episodes, and who competes in the Ultimate Fighting Championship.