Treat Williams is a American actor best known for his starring role as Dr. Andy Brown in the family drama television series Everwood, from 2002-2006.
He also had a starring role as Don Kowalski, a Chicago police sergeant in the Bureau of Patrol who is a third generation cop and is married to Sheila Kowalski, in the police procedural television series Against the Wall, in 2011.
He began his career in musical comedy on Broadway as an understudy in Grease, eventually taking over the lead role of Danny Zuko.
Williams' first important film role was Berger in Hair. His other films have included The Ritz, The Eagle Has Landed, Prince of the City, 1941, Smooth Talk, which won first prize at the Sundance Film Festival, Once Upon a Time in America, Woody Allen's Hollywood Ending, Deep Rising, Things to Do in Denver When You're Dead, The Phantom, The Deep End of the Ocean, The Devil's Own, What Happens in Vegas, Howl, 127 Hours and the soon-to-be-released A Little Bit of Heaven and Blackbird.
Williams' Broadway credits include Grease, Over Here, Once in a Lifetime, Love Letters, Pirates of Penzance and Steven Sondheim's Follies. Off Broadway, he has performed in Bus Stop, Some Men Need Help, David Mamet's Oleanna and Captains Courageous.
Williams' television credits include A Streetcar Named Desire, J. Edgar Hoover, Dempsey, The Late Shift, the Lifetime Original Movie The Staircase Murders and Max and Helen, to name a few.
For four seasons, he starred as Dr. Andy Brown in the critically-acclaimed series Everwood for which he was twice nominated for the Screen Actors Guild Award as Best Actor. He has been nominated for four Golden Globe Awards, an Emmy and has won two Theatre Guild Awards.
Williams directed the short film, Texan, written by David Mamet, for which he won awards for Best Film at three film festivals.
A pilot with over 8,000 hours in the cockpit, Williams has been flying airplanes and helicopters for more than 30 years. His first children's book, Airshow is available in bookstores.
Born in Connecticut, Williams currently lives in the mountains of Utah with his wife and two children.