In the movie Cindrella Man she has played the role of neighbor called Sara Wilson, which depicted the life of James J. She has been featured in various roles in a number of movies and TV shows.She was raised in Hanover Township, New Jersey and she graduated from Whippany Park High School.
She appeared in Season 1 of the AMC 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. De Witt has also appeared on television in Law & Order: Special Victims Unit, Sex and the City, Rescue Me, and Love Monkey.
Her birthplace is Flushing, Queens that lies in New York, USA.
Her parents are Rosemarie Baddock and Kenny Dewitt. Braddock who was a well-known boxer was her grandfather.
She starred in the horror/thriller Poltergeist (2015), a remake of the 1982 film of the same name.
and played the role of neighbor Sara Wilson in the movie Cinderella Man, which depicted James J. De Witt lived in Hanover Township, New Jersey, and is a graduate of Whippany Park High School.From May 4–23, 2010, De Witt appeared in MCC Theater's Off Broadway play Family Week, written by Beth Henley and directed by Jonathan Demme.In its review of the play, the New York Times stated that De Witt's lead performance "has many affecting moments as the beleaguered Claire." De Witt appeared in Showtime's series United States of Tara as Tara's sister, Charmaine.Rosemarie Braddock Dewitt who is also known as Rosemarie Dewitt is one of the most popular American actresses.She was born on 26th October 1971, which makes her age 43. De Witt played Emily Lehman in the Fox television series Standoff (2006–07), co-starring with her future husband Ron Livingston, as well as Charmaine Craine on United States of Tara.