Best known as Miss Yvonne on the television series Pee-wee's Playhouse, she reprised her famous role in a 2010 Broadway production based on the popular comedy program. Her other television credits include guest spots in episodes of M*A*S*H and Night Court.
Early in her career, she played the role of Barbara on the ABC sitcom Laverne & Shirley and became a close friend of the series' star, Cindy Williams.
She appeared with comedian Tracey Ullman in both Tracey Ullman's State of the Union (on Showtime) and Tracey Ullman in the Trailer Tales (on HBO).
She was born and raised in Los Angeles, California.
She had a recurring role on the Rob McElhenney-created series It's Always Sunny in Philadelphia.