Dermot Mulroney is an American actor best known for his roles in romantic comedies, including the male lead in My Best Friend's Wedding (1997) alongside Julia Roberts and Cameron Diaz, and The Wedding Date (2005), as Debra Messing's escort to her sister's wedding.
He played Gavin Mitchell on the television sitcom Friends. His character dated Rachel for one episode but they broke up when it became too complicated between them because of Ross.
He also has a starring role as Francis Gibson, an ex-CIA analyst who was betrayed by the government, in the mystery thriller television drama series Crisis.
Mulroney also co-stars in the film adaptation of Tracy Letts' Pulitzer Prize- and Tony Award-winning play, August: Osage County, opposite Meryl Streep and Julia Roberts, and directed by John Wells. He plays Steve Heidebrecht, who is the less-than-perfect man engaged to Karen Weston (Juliette Lewis).
Dermot also starred in Jobs, opposite Mia Wasikowska and Nicole Kidman, as well as in Chan Wook Park's Stoker and Calvin Lee Reeder's psychedelic western, The Rambler. All three films premiered at the 2013 Sundance Film Festival.
Throughout his career, Mulroney has starred in dozens films, working with the industry's top filmmakers and talent. His film credits include Joe Carnahan's The Grey, with Liam Neeson; Clint Eastwood's J. Edgar, with Leonardo DiCaprio; Marc Abraham's Flash of Genius, with Greg Kinnear; Garry Marshall's Georgia Rule, with Jane Fonda; David Fincher's Zodiac, with Jake Gyllenhaal; The Family Stone, with Diane Keaton, Sarah Jessica Parker and Claire Danes; Gary David Goldberg's Must Love Dogs, with Diane Lane and John Cusack; Alexander Payne's About Schmidt, with Jack Nicholson; P.J. Hogan's My Best Friend's Wedding, with Julia Roberts and Cameron Diaz; Robert Altman's Kansas City, with Jennifer Jason Leigh; Young Guns, with Kiefer Sutherland; and Blake Edward's Sunset, with James Garner and Bruce Willis.
On television, Mulroney guest starred in the second season of HBO's Enlightened, opposite Laura Dern, and as Zooey Deschanel's love interest on Fox's New Girl.
Mulroney is a classically trained cellist who has played with the scoring orchestras for Academy Award-winning composers such as James Newton Howard and Michael Giacchino.
A graduate of Northwestern University, Mulroney resides in Los Angeles.