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Actress Rosemarie DeWitt premiered onscreen in the early to mid-2000s and essayed a series of bit roles -- initially in A-list features such as Cinderella Man (2005) and Off the Black (2006). She scored a lead opposite Ron Livingston on the small screen, as a federal agent in the hostage-crisis drama Standoff (2006), but unfortunately, that program folded after a rather short life span, and DeWitt returned to supporting turns -- notably a colorful characterization as Midge Daniels, the bohemian mistress of a successful ad executive during the early '60s on AMC's serialized drama Mad Men (2007). In 2008 DeWitt co-starred with Anne Hathaway in director Jonathan Demme's drama Rachel Getting Married, and landed a supporting role in the first two seasons of The United States of Tara (2009-2010), a Showtime drama following a suburban woman living with Dissociative Personality Disorder. In 2011 she co-starred and consulted for Your Sister's Sister, a drama wherein she portrayed a heartsick young woman who bonds with a man grieving the death of his brother. She co-starred with Jennifer Garner and Dianne Weist in The Odd Life of Timothy Green the following year.