Dennis Kelly nasceu o 7 de julho de 1943 em Salt Lake City, Utah, EUA. Era ator e foi conhecido pelo seu trabalho em Boss (2011), Dama de Ouro (1985) e Detroit 1-8-7 (2010). Morreu o 29 de maio de 2016.
Played "Cinderella's Father/Understudy for Narrator/Mysterious Man" in "Into the Woods", a musical by Stephen Sondheim and James Lapine (Ahmanson Theatre, Los Angeles, California, USA).
1992 Artisan and After Dark Awards for his work in "Phantom!" at Candlelight Dinner Playhouse, Chicago, Illinois. Also an After Dark Award for his work in "La Cage aux Folles" at Candlelight Dinner Playhouse, Chicago, IL.