About Rosemarie DeWitt
Rosemarie Braddock DeWitt is an American actress. DeWitt played Emily Lehman in the Fox television series Standoff (2006–07), co-starring with her future husband Ron Livingston. She appeared as Charmaine Craine on United States of Tara. She also was the title character in 2008's Rachel Getting Married, garnering several awards and nominations for best supporting actress. She starred as Ryan Gosling's character Sebastian's sister Laura Wilder in the Oscar-winning movie La La Land. She also starred in the horror/thriller Poltergeist (2015), a remake of the 1982 film of the same name. In addition to her role on United States of Tara, DeWitt also recurred on the AMC series Mad Men, playing Midge Daniels, Don Draper's (Jon Hamm) bohemian mistress, in the show's first season. Kaufman's The Butter and Egg Man at the Atlantic Theater Company; and Craig Lucas' Small Tragedy, for which the entire cast won an Obie Award.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.