Jennifer Coolidge (born August 28, 1963) is an American actress best known for playing "Stifler's mom," the older woman in the film American Pie (1999), Hilary Duff's stepmother in A Cinderella Story (2004), Paulette, the manicurist in Legally Blonde (2001) and its sequel, the voice of Aunt Fanny in the animated feature Robots (2005), for her role in The Secret Life of the American Teenager as Betty, and for her regular role in the NBC sitcom Joey as Joey's agent, Bobbie Morganstern. She is also a regular actor in Christopher Guest's Mockumentary films.
Coolidge was born in Boston, Massachusetts, the daughter of Gretchen (née Knauff) and Paul Constant Coolidge, a plastics manufacturer. She was raised in Norwell, Massachusetts, and has a sister, Susannah. Coolidge attended Norwell High School, the Cambridge School of Weston and Emerson College in Boston. Her charitable work has included a history of supporting AIDS assistance.
Coolidge is known for her supporting roles in many comedy movies and guest spots on television. She is best known for playing "Stifler's mom", the consummate "MILF," in the American Pie films, though she is also known for supporting parts in other films, including Hilary Duff's stepmother in A Cinderella Story, Paulette, the manicurist in Legally Blonde and its sequel, "Hottie Police Officer" in A Night at the Roxbury, and the voice of Aunt Fanny in the animated feature Robots.