Tom Sizemore is an American film and television actor. Born September 29, 1961, in Detroit, Michigan, Sizemore attended Wayne State University and earned a Master's Degree in theater from Temple University in 1986. He subsequently moved to New York City to pursue an acting career. One of his first film roles was in Oliver Stone's Born on the Fourth of July in 1989. A succession of well-received supporting parts followed. His first major leading role was in 1997's The Relic.

Sizemore continued to play leading and character parts in many films, notably Saving Private Ryan, HBO's Witness Protection (movie), Pearl Harbor (movie), and Black Hawk Down (movie).

In 2002, Sizemore starred in the well-reviewed but short-lived television drama series Robbery Homicide Division. It was cancelled mid-way through its first season.

Sizemore, who had long battled drug addiction, was convicted in 2003 of assault and battery against his girlfriend, Heidi Fleiss. He is currently serving six months in prison.