Mark Kassen originated the role of "Ben" in the off-Broadway play, "Things You Shouldn't Say past Midnight". He performed in the Broadway production of "The Last Night of Ballyhoo", and traveled with the production to Los Angeles. A produced playwright, Mark's multi-media play "Perfect" was mounted at the Tiffany Theatre in Los Angeles in 2001. It was funded by Rhea Perlman, Danny DeVito and Jean Doumanain. He wrote and performed a workshop of his multi-media play "little Willy" at the prestigious New York Stage and Film in the 2005 summer season under the direction of John Rubin. With brother Adam, partnered with Kevin Spacey and Dana Brunetti to found Trigger Street Independent in 2004.