Martin James Pflieger Schienle (born July 30, 1982), professionally known as Martin Starr, is an American actor and comedian. He is known for the television roles of Bill Haverchuck on the short-lived comedy drama Freaks and Geeks (1999–2000), Roman DeBeers on the comedy series Party Down (2009–2010, 2023), Bertram Gilfoyle on the HBO series Silicon Valley (2014–2019), for his film roles in Knocked Up (2007) and Adventureland (2009), and as Roger Harrington in the Marvel Cinematic Universe films The Incredible Hulk (2008), Spider-Man: Homecoming (2017), Spider-Man: Far From Home (2019), and Spider-Man: No Way Home (2021).

Personal life
Starr was born in Santa Monica, California, the son of actress Jean St. James (née Pflieger). He is of German, British, and Eastern European descent. He is a Buddhist.

In an interview with Wired, Starr said that he felt "frustrated and depressed" at 22 due to lack of offers in the years after Freaks and Geeks was cancelled. He had fired his agent and decided to quit acting altogether; however, a few years later he was offered Knocked Up, and other offers then started to come his way.