Actor
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.
Acting

Everybody Hates Chris
Mr. Richards · 2005

ER
Kevin Halloran · 1994

Full House
Anchorman · 1987

MacGyver
Cop · 1985

The West Wing
Guest · 1999

Paradise
Billionaire #1 · 2025

Murder, She Wrote
Guard · 1984

JAG
Otis Flannik · 1995

Our Friend
Richard · 2019

Yes, God, Yes
Priest · 2020

7th Heaven
Ken · 1996

Profiler
Trooper Jasper · 1996

Adult Swim Yule Log
Sheriff · 2022

Femme Fatales
Detective Mitchum · 2011

Turbulent Skies
Gardner · 2010

U.S. Marshals: Waco & Rhinehart
FBI Agent #1 · 1987

Reasonable Doubts
Hanratty · 1991

Hot Dog... The Movie
Event Starter · 1984

Crazy like a Fox
Nolan · 1984

Dead Silent
Will Hilton · 2016

It's Florida, Man.
Joe Jones · 2024

An Accidental Christmas
Mr Carroll · 2007
Tribes
Carl · 1990

Zarkorr! The Invader
George Ray · 1996