Will Rothhaar was born in New York City on January 12, 1987. He made his stage debut in 1991. At the age of 4, he made his acting debut as Sonny in "Cat on a Hot Tin Roof," at Pennsylvania's Allenberry Playhouse. Since then, his career has grown to include extensive work in film, television, theater, and commercials.In 1999, he received the Hollywood Reporter Young Star Award (Theater) for his portrayal of John in David Mamet's The Cryptogram at the Geffen Playhouse. His feature film work includes Hearts in Atlantis (2001), Kart Racer (2003), Jack Frost (1998), Now You Know (2002), American Strays (1996), and Kingpin (1996).He was a regular on the CBS series Listen Up (2004), on which he played _Jason Alexander's son Mickey Kleinman. Additionally, he has appeared on television in "Black And Blue" and American Daughter"; the live broadcasts of "Fail-Safe" and "On Golden Pond"; and "Journey Of The Heart"; JAG (1995) (recurring as Josh Pendry); "ER"; "Judging Amy"; "Family Law"; "Mad About You"; "Buffy, The Vampire Slayer"; "Everything's Relative"; "Dr. Quinn, Medicine Woman"; "Hang Time"; "Pacific Blue"; "Innocent Victims" (Mini-series); "In the Line of Duty: Kidnapped"; and "Letter to My Killer."In addition to "Cryptogram" and "Cat on a Hot Tin Roof," his stage work includes "Waiting For Godot" at the Matrix Theater and "Of Mice and Men," "Ardèle," "The Visit," "A Christmas Carol," "Macbeth," "According to the Fifth Grade," and "A Midsummer Night's Dream or the Night They Missed the Forest for the Trees," all of which were performed at the Pacific Resident Theater.His national commercials include Snap.Com (an Emmy-winning spot), J.C. Penney, Sprint, Leapfrog Learning Software, Honda, Lee Jeans, Microsoft, Kodak, At&T, Fruit of the Loom, Bugle Boy, and Service Merchandise.In the course of his career, he has worked with such distinguished actors as Anthony Hopkins, Christopher Plummer, Julie Andrews, Jason Alexander, George Clooney, Richard Dreyfuss, Randy Quaid, Helen Hunt, Cybill Shepherd, Christine Lahti, Tom Skerritt, Anthony LaPaglia, Mary Stuart Masterson, Eric Roberts, Paul Reiser, Sela Ward, David Dukes, Orson Bean, David James Elliott, Dabney Coleman, Anthony Andrews, Ed Begley Jr., Tony Danza, and Tyne Daly. He also worked with such noted directors as Scott Hicks, Stephen Frears, Spike Jonze, Peter Farrelly and 'Bob Farrelly', Gilbert Cates, and Martha Coolidge.Will is the son of actor-director Michael Rothhaar and actress-playwright Nancy Linehan Charles. His brother, Charles F. Linehan, is an Assistant District Attorney for the Borough of Manhattan in New York City.