Sam Rockwell was born on November 5, 1968, in San Mateo, California, the only child of two actors, Pete Rockwell and Penny Hess. The family moved to New York when he was two years old, living first in the Bronx and later in Manhattan. When Sam was five years old, his parents separated, at which point he and his father moved to San Francisco, where he subsequently grew up, while summers and other times were spent with his mother in New York.He made his acting debut when he was ten years old, alongside his mother, and later attended J Eugene McAteer High School in a program called SOTA. While still in high school, he got his first big break when he appeared in the independent film Clownhouse (1989). The plot revolved around three escaped mental patients who dressed up as clowns and terrorized three brothers home alone--Sam played the eldest of the brothers. His next big break was supposed to have come when he was slated to star in a short-lived NBC TV-series called Dream Street (1989), but he was soon fired.After graduating from high school, Sam returned to New York for good and for two years he had private training at the William Esper Acting Studio. During this period he appeared in a variety of roles, such as the ABC Afterschool Specials (1972): Over the Limit (1990) (TV) and HBO's Lifestories: Families in Crisis (1992): Dead Drunk: The Kevin Tunell Story (Season 1 Episode 7: 15 March 1993); the head thug in Les tortues ninja (1990); and a guest-star turn in an Emmy Award-winning episode of New York - Police judiciaire (1990), while working a string of regular day jobs and performing in plays.In 1994, a Miller Ice beer commercial finally enabled him to quit his other jobs to concentrate on his acting career, which culminated in him having five movies out by 1996: Basquiat (1996); À la Recherche de Jimmy-Le-Borgne (1994); Une virée d'enfer (1995); Mercy (1995); and Box of Moonlight (1996). It was the latter film that would prove to be his real break-out in the industry. In Tom DiCillo's film, he found himself playing an eccentric named the Kid, a man-child living in a half-built mobile home in the middle of nowhere with a penchant for dressing like Davy Crockett, who manages to bring some much-needed chaos into the life of an electrical engineer played by John Turturro. The movie was not a box-office success, but it managed to generate a great deal of critical acclaim for itself and Sam.In 1997, he found himself the star of another critically lauded film, Lawn Dogs (1997). Once again, he portrayed a societal outcast as Trent, a working-class man living in a trailer, earning a living mowing lawns inside a wealthy, gated Kentucky community. Trent soon finds himself befriended by 10-year-old Devon (Mischa Barton), and the movie deals with the difficulties in their friendship and the outside world. He also gave strong performances in the quirky independent comedy Casses en tous genres (1998), in which he plays one half of a pretty awful singing duo (the other half being played by Steve Zahn) that gets mistaken for two safecrackers by Jewish gangsters; and the offbeat hitman trainee in Jerry et Tom (1998) against Joe Mantegna.After a few smaller appearances in films such as Woody Allen's Celebrity (1998) and the modern version of Le songe d'une nuit d'été (1999), in which he played Francis Flute, he had larger roles in two of the bigger hit movies to emerge: La ligne verte (1999) and Galaxy Quest (1999), wowing audiences and critics alike with his chameleon-like performances as a crazed killer in the former and a goofy actor in the latter.More recently, he appeared in another string of mainstream films, most notably as Eric Knox in Charlie et ses drôles de dames (2000) and as Zaphod Beeblebrox in H2G2 : Le Guide du voyageur galactique (2005), while continuing to perform in smaller independent movies. After more than ten years in the business, Sam has earned his success. In 2018, he won an Academy Award for Best Supporting Actor as a troubled police deputy in 3 Billboards: Les panneaux de la vengeance (2017).