Michelle Lynn Monaghan (born March 23, 1976) is an American actress. Her first notable roles were in episodes of Young Americans, and Law & Order: Special Victims Unit, both in 2001. That year she also her big screen debut in the movie "Perfume" (2001), followed by another small role in "Unfaithful" (2002).

Monaghan had her big break in 2002 when she co-starred in the television series Boston Public.  She is known for her roles in feature films including Kiss Kiss Bang Bang, Gone Baby Gone, Made of Honor, The Heartbreak Kid, Eagle Eye and the Mission: Impossible franchise.