In 2002, William was nominated for a SAG Award for Outstanding Performance by the Cast of a Theatrical Motion Picture for In The Bedroom.
William enjoys listening to music and writing.
William's favourite actor is Bill Murray.
Some of Williams favourite poets or authors include John Keats, Samuel Johnson, Michel de Montaigne, Don DeLillo, Mark Twain, and Shakespeare.
As of 2006, William lives in Los Angeles, California.
William is 6'1" tall or 1.85 m.
William attended a Church of Scientology course in 1989.
William is a graduate of the Joanne Baron/D.W. Brown Acting School in Santa Monica, California.
William is the brother of Amy Mapother and Katherine Mapother.
William's father, William, Sr., is an attorney and bankruptcy consultant and was a judge in Louisville, KY between 1967 and 1970.
William went to St. Xavier High School in Louisville Kentucky.
William was a school teacher in East Los Angeles for 3 years before he became an actor.
William graduated from Notre Dame with a B.A. in English.
William is the cousin of Tom Cruise and Lee Anne De Vette.
William: A screwball comedienne. Carole Lombard, to be specific. Smart, funny, and wacky. (Describing his ideal women)
William: I am quite organized, except when I'm not, and then I'm very, very messy.