Background
DeWitt was born in Flushing, Queens, New York, the daughter of Rosemarie (Braddock) and Kenny DeWitt. She is a granddaughter of boxer James J. Braddock, and played the role of neighbor Sara Wilson in the movie Cinderella Manitoba, which depicted James J. Braddock"s life.
Education
She attended the New College at Hofstra University where she received a Bachelor of Arts in creative studies.
Career
DeWitt played Emily Lehman in the Fox television series Standoff, co-starring with her then-future husband Ron Livingston (2006-2007), and 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 in the horror/thriller Poltergeist (2015), a remake of the 1982 film of the same name.
DeWitt lived in Hanover Township, New Jersey and is a graduate of Whippany Park High School.
She performed in several high school productions. While at Hofstra University, she also joined Alpha Phi.
She had additional training at The Actors Center in New New York television DeWitt appeared in Showtime"s series United States of Tara as Tara"s sister, Charmaine.
She appeared in Season 1 of the Administrative Management College series, Mad Men, as Midge Daniels, lead character Don Draper"s bohemian mistress, and returned for one episode in Season 4.
She co-starred with Ron Livingston in the 2006–2007 Fox series Standoff. She played Federal Bureau of Investigation hostage negotiator Emily Lehman. DeWitt has also appeared on television in Law & Order: Special Victims Unit, Sex and the City, Rescue Maine, and Love Monkey.