|Date of birth||24 December 1964|
|Origin||Ogdensburg, New York, USA|
Mark Valley is the actor who portrays Warren Lytell.
Valley obtained his first role, on The Innocent (1993), while serving in the U.S. Army in Germany. He landed the role of "Father Pete" on Another World in 1993. He later took over the role of Jack Deveraux on the NBC Daytime soap opera Days of our Lives from 1994-97. In 2003, Valley played Detective Eddie Arlette, an American police officer in London, on the short-lived Keen Eddie.
He played Brad Chase on Boston Legal, a spinoff of the television series The Practice. Valley also appeared on the television series ER as Richard Lockhart, Abby Lockhart's ex-husband. In 2008 he appeared on Fringe, as FBI agent John Scott. Valley played the lead in Fox's drama Human Target.
- Served in Operation Desert Storm
- Has one daughter, Sherri Ann (b.1987).
- Graduated West Point in 1987 with a degree in mathematics.