Cosgrove has been married to his wife, Marie, since 1997. They have four children: Lily, 18, Esme, 15, Ruby Willow, 13, and Finnian Jack, 9.
- Was a bailiff in the New Haven County Sheriff's Department.
- Played Scott Chandler on All My Children from 1996-98, and returned to daytime soaps in 2002 as Bill Lewis on Guilding Light
- Movie debut was a bit part in 1998's The Object of My Affection