Mark Costello
Biography
Mark began working professionally in Los Angeles back in 1983, when he booked his first job as the "Starter" in, Hot Dog...the Movie". He continued working numerous Co-Star and Guest spots on episodic TV such as, "Murder She Wrote, "Dynasty," Knots Landing," "Who's the Boss," "LA Law," "Full House", "Seventh Heaven," "ER," "N.Y.P.D. Blue," "The West Wing," and "Criminal Minds." Mark also had recurring roles on such television shows as, "Bay City Blues," "JAG", and "First Monday." In 1990, Mark had a three year contract on the FOX youth oriented drama, "Tribes". Mark was very established in the theatre world in Los Angeles, having won Best Actor in a Feature Role from Stage Scene LA, for his performances in,"Finding Fossils" and "John is a Father" at The Road Theatre, as well as "Mom's Dead", at Sacred Fools. Mark appeared with Susan Sullivan and David Selby in Edward Albee's, "A Delicate Balance," at the Odyssey Theatre , which won the LA Drama Critics Circle McCulloh Award for Best Revival. Mark moved to Atlanta in 2017 and has appeared in the films, "Yes, God, Yes," "Our Friend" and the independent feature film, "Charles Sloan", which he played the title role, and which won For Best Full Length Feature Film at the 2022 Raleigh Film and Arts Festival.
Known For
Acting History
2025
Paradise as Billionaire #1
2023Charles Sloan as Charles Sloan
2022Adult Swim Yule Log as Sheriff
2020Yes, God, Yes as Priest
2019Our Friend as Richard
2017Doobious Sources as Blake Morgan
2016Dead Silent as Will Hilton
2011Femme Fatales as Detective Mitchum
2010Turbulent Skies as Gardner
2008Solar Flare as Dispatcher Howard
2007An Accidental Christmas
2005Everybody Hates Chris as Mr. Richards
2005Locusts as Director Rusk
1999The West Wing as Guest
1996Profiler as Trooper Jasper
19967th Heaven as Ken
1996Zarkorr! The Invader as George Ray
1995JAG as Otis Flannik
1995JAG as Wallace
1995JAG as Commander Onclay
1994ER as Kevin Halloran
1991Reasonable Doubts as Hanratty
1990Faith as Policeman
1990Tribes as Carl
1987Full House as Anchorman
1987U.S. Marshals: Waco & Rhinehart as FBI Agent #1
1985MacGyver as Cop
1984Crazy like a Fox as Nolan
1984Murder, She Wrote as Guard
1984Murder, She Wrote as Sgt. O'Connor
1984Murder, She Wrote as Officer
1984Hollywood Hot Tubs as Mr. Slate
1984Hot Dog... The Movie as Event Starter
1979Knots Landing





