In 1996, he joined the cast of the ABC Soap "All My Children" in the role of Scott Chandler. He left the show in the fall of 1998 to explore other opportunities. That same year, Cosgrove moved to Los Angeles to take the role of Matt Durning on Beverly Hills 90210, where he remained until the show ended in 2000.
Cosgrove moved back to California for his role as "Jon Lemonick" in the series, In Justice, which premiered on ABC in January 2006. In September 2007, he portrayed "Freddy Mason" on the ABC drama Dirty Sexy Money. In March 2010, he began playing the role of Chris Hughes on As the World Turns until the show ended in September 2010. Cosgrove has recently been confirmed to be returning to AMC as Scott Chandler. A first airdate will be sometime in December 2010. The role is currently being played by Adam Mayfield who was fired from the show in early September 2010.
- 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.
- Esme Cosgrove - Daughter
- Lily Cosgrove - Daughter
- Marie Cosgrove - Wife
- Ruby Willow Cosgrove - Daughter
- Finnian Jack Cosgrove - Son