Dr. Peter Weller is best known for playing the titular lead in Robocop (1987) and Robocop 2 as well as John Paxton in Star Trek: Into Darkness.

While a student of legendary actress and drama coach, Uta Hagen, Weller appeared on and off Broadway in works like William Inge's "Summer Brave", Thomas Babe's "Rebel Women" and "Full Circle", one of the last plays directed by Otto Preminger. He began garnering critical acclaim with his portrayal of Billie Wilson in "Streamers", directed by Mike Nichols for Joseph Papp at Lincoln Center. He continued that success with his performances as Cliff in "The Woolgatherer" and as Nick in the first American production of David Mamet's "The Woods". During this period, he became a member of the highly respected Actor's Studio, under the aegis of Elia Kazan and Lee Strasberg.

Weller's film debut was in Richard Lester's Butch and Sundance: The Early Days (1979). He then co-starred with Alan King and Ali MacGraw in Sidney Lumet's Just Tell Me What You Want (1980) and, with Albert Finney and Diane Keaton, in Alan Parker's Shoot the Moon (1982). Other film credits include Firstborn (1984) with Teri Garr, the HBO made-for-TV Apology (1986), co-starring Lesley Ann Warren, and Of Unknown Origin (1983), the film which won Weller the Best Actor award at the Paris International Film Festival for his performance as an upwardly mobile bachelor with a serious rat problem. That same film also marked his first association with Leviathan (1989) director George P. Cosmatos.