Acting
Mark Costello
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
Full filmography

JAG
1995
DRAMA
Murder, She Wrote
1984
MYSTERY
Knots Landing
1979
DRAMA
ER
1994
DRAMA
MacGyver
1985
DRAMA
Full House
1987
COMEDY
Paradise
2025
CRIME
Everybody Hates Chris
2005
COMEDY
Profiler
1996
CRIME
7th Heaven
1996
FAMILY
Femme Fatales
2011
DRAMA
It's Florida, Man.
2024
COMEDY
Yes, God, Yes
2020
DRAMA
Our Friend
2019
DRAMA
Hot Dog... The Movie
1984
COMEDY
Locusts
2005
ACTION
Turbulent Skies
2010
ACTION