Actor Bio

Sean Grennan is an actor and writer, originally from Oak Park, Illinois.  He has appeared on stages around the country including Chicago, New York, Florida, and Kansas City.  His favorite show to date was Rap Master Ronnie, a musical revue by Gary Trudeau and Elizabeth Swados, where he met his wife, Kathy Santen.  They have been together since ’84 and have had the opportunity to act opposite one another numerous times.  Sean has appeared in the movies The Untouchables and Rudy and on TV in Law & Order CI, Law & Order SVU, Mindhunter, Early Edition, The Human Factor, The Untouchables, Unsolved Mysteries, Staring Back, and others.  He has also appeared in many regional and national commercials and industrials.  In ’19, Kathy finished a 13-year run in Broadway’s Wicked.  After spending most of their lives in Chicago and New York City, Sean and Kathy now live in Pennsylvania where they share a lovely home, canoe, golf cart, and office space with their excellent dog, Hank. Sean is a proud member of Actors’ Equity Association, SAG/AFTRA, and The Dramatists Guild.