Marty Grabstein was born on November 28th 1954. Grabstein grew up in Astoria. When he was a child he was taught taekwando as defense against bullies in his neighborhood.

Marty, who was always a natural actor sought a career in movies. His first role was in Bury the Evidence. The next year Grabstein's voice talents earned him the role of Courage on Cartoon Network's Courage the Cowardly Dog (1999). The show ran until 2002. After the end of his show, Marty made frequent appearances on Law and Order, and Law and Order Special Victim's Unit. Film credits include Apartment #5C and Third Watch.

Theses days you can find Marty driving a trolley in New York, entertaining passengers with his comedic antics. He lives in New Jersey with his wife Nancy and his two boys Matthew and Daniel.