Mars Callahan Movies, TV Shows, and online popularity.

Mars Callahan (born Gregory Mars Martin on December 1, 1971) is an American actor, film director, producer, and writer. He gained recognition for his work in the film Poolhall Junkies, where he served as director, actor, and screenwriter. Callahan started his career at a young age, touring with a children's musical group and landing his first acting role in the television series The Wonder Years at fifteen. He later transitioned to the big screen and appeared in various films. Inspired by the directors he worked with, Callahan ventured into directing and shot his first short film, The Red Bag, in 1998. He co-founded Big Sky Motion Pictures, a film production company based in Los Angeles. In a 2007 interview, Callahan disclosed his battle with serious health issues, which resulted in the loss of his right kidney and adrenal gland.