Stewart’s other credits include several roles as nurses on popular TV series M*A*S*H, a small role in the film American Graffiti in 1973 and the voice of Shirley in cartoon Mork & Mindy/Laverne & Shirley/Fonz Hour in 1982.
News of the actor’s death was announced on social media on Saturday (22 February) by her friend and fellow actor Cassandra Peterson, known for playing horror hostess Elvira, Mistress of the Dark.
It’s Always Sunny in Philadelphia and Pee-wee’s Playhouse star Lynne Marie Stewart has died, aged 78.
She was most recognised for her role as Miss Yvonne , The Most Beautiful Woman in Puppetland, on the popular American children’s show Pee-wee’s Playhouse.
She was also known for her recurring role as janitor Charlie Kenny’s mother Bonnie, in It’s Always Sunny in Philadelphia, the longest running US sitcom in history.
