William Edward "Will" Rothhaar is an American actor. He was born in New York City, New York, the son of Michael Rothhaar and Nancy Linehan Charles, both of whom are playwrights, actors and directors.
He began acting in the mid-1990s, and appeared in several made-for-television films and series, including Buffy the Vampire Slayer and Mad About You. He had supporting roles in several feature films, including Jack Frost and Hearts in Atlantis. In 1999, he received the Hollywood Reporter "Young Star Award" for his portrayal of John in David Mamet's The Cryptogram at the Geffen Playhouse. Rothhaar's biggest role to date was the leading role in Kart Racer. In 2004, he had a recurring role on Listen Up!. He appeared in Must Love Dogs and as Cpl. Lee Imlay in the alien-invasion movie Battle: Los Angeles. He appeared on two episodes of CSI: Crime Scene Investigation, CSI: Miami, and CSI: New York, playing different characters each time. In 2013, he starred opposite Rob Lowe in Killing Kennedy, a made-for-television movie.