[2][3] At the age of eleven, Callahan toured with a children's musical group through thirty-seven states.
After honing his acting skills in television he tried for the big screen and soon appeared in various films.
Big Sky Motion Pictures was founded in Los Angeles as a film production company by Mars Callahan and executive producer Rand Chortkoff.
[4] In a 2007 interview with The Hollywood Reporter, Callahan revealed that he has had serious health problems when doctors found a tumor in his right kidney.
[5] Callahan cashed in 94th place in the 2011 World Series of Poker main event, earning $64,531.