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Mars Callahan

Mars Callahan was born in 1971 in Studio City, Los Angeles, California, USA as Gregory Mars Martin. He is an actor and director, known for Poolhall Junkies (2002), Kalifornia (1993) and What Love Is (2007). See full bio »
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What Love Is
| The Hollywood Reporter
Poolhall Junkies
| The Hollywood Reporter

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Known For


Hide Hide Show Show Actor (22 credits)
 2015 Four Kings (TV Series)
Mars Callahan
 2007 What Love Is
 2002 Poolhall Junkies
 2001 Zigs
Clyde (as Gregory 'Mars' Martin)
 1996 That Thing You Do!
Ernie the Disc Master Engineer
 1995 The Office (TV Series)
- Power Playing (1995) ... (as Gregory 'Mars' Martin)
 1994 ER (TV Series)
- 9 1/2 Hours (1994) ... Matt (as Gregory 'Mars' Martin)
 1994 Clifford
Brian (as Gregory 'Mars' Martin)
 1993 Kalifornia
Walter Livesy (as Gregory Mars Martin)
 1991 Highway to Hell
State Policeman (as Gregory Mars Martin)
 1991 CBS Schoolbreak Special (TV Series)
- Lies of the Heart (1991) ... Dave
 1990 The Trials of Rosie O'Neill (TV Series)
Bill Abbott
- So Long Patrick (1990) ... Bill Abbott (as Gregory 'Mars' Martin)
 1989 I Know My First Name Is Steven (TV Movie)
Victor (Age 14) (as Gregory 'Mars' Martin)
 1988-1989 The Wonder Years (TV Series)
- Birthday Boy (1989) ... Steve (as Gregory 'Mars' Martin)
- My Father's Office (1988) ... Steve (as Gregory 'Mars' Martin)
 1989 TV 101 (TV Series)
Jock #1
- First Love: Part 1 (1989) ... Jock #1 (as Gregory 'Mars' Martin)
 1988 Knots Landing (TV Series)
- The Pick-Up Game (1988) ... Man (as Gregory 'Mars' Martin)
 1988 The Facts of Life (TV Series)
- Present Imperfect (1988) ... Larry (as Gregory 'Mars' Martin)
 1987 Cagney & Lacey (TV Series)
- Happiness Is a Warm Gun (1987) ... (as Gregory 'Mars' Martin)
 1986 Growing Pains (TV Series)
- Dream Lover (1986) ... Buzzy (as Gregory 'Mars' Martin)
 1986 The Children of Times Square (TV Movie)
Brian (as Gregory 'Mars' Martin)
 1985 Misfits of Science (TV Series)
- Sort of Looking for Gina (1985) ... Zack (as Gregory 'Mars' Martin)
Show Show Director (5 credits)
Show Show Writer (4 credits)
Show Show Producer (2 credits)
Show Show Self (2 credits)
Show Show Archive footage (1 credit)

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Personal Details

Alternate Names:

Gregory 'Mars' Martin | Gregory Mars Martin


6' 6" (1.98 m)

Did You Know?


Older brother of America Martin. See more »

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