Lynne Marie Stewart, known for her work in 'Pee-wee's Playhouse' and 'It's Always Sunny in Philadelphia' has died at age 78.

Lynne Marie Stewart, the TV actress best known for her roles on "It's Always Sunny in Philadelphia" and "Pee-wee's Playhouse," has died. She was 78. Stewart's death was confirmed by her friend Cassandra Peterson on Instagram.

Lynne Marie Stewart, star of Pee-wee’s Playhouse and It’s Always Sunny in Philadelphia, has reportedly died. She was 78. Stewart’s death was announced by a friend on Instagram on Friday, Feb. 21.