Actress Lynne Marie Stewart, best known for roles in Pee-wee's Playhouse and It's Always Sunny in Philadelphia, has died at the age of 78, her friend, Elvira actress Cassandra Peterson, revealed in a post shared on her Instagram account.
"My heart is breaking upon hearing the news of my dear friend @lynnestewart78 Lynne Stewart’s passing. One of the kindest, sweetest, funniest women who ever lived. The iconic Miss Yvonne of Pee-wee’s Playhouse: She’ll always be 'the most beautiful woman in Puppetland.' 💔," Peterson wrote.
Stewart began her career in the Hollywood sketch group 'The Groundlings,' where she met future Pee-wee Herman star Paul Reubens, and later played Miss Yvonne, known as 'the most beatufiul woman in Puppetland,' in the 1981 Broadway stage version of The Pee-wee Herman Show, a role she'd later continue across film and television. The actress later played Bonnie, the mother of Charlie Kelly, played by actor Charlie Day, in 18 episodes of It's Always Sunny in Philadelphia from 2005 to 2023.
Day paid tribute to Stewart in a post shared on his Instagram account following news of her death.
"The brilliant and talented Lynne Marie Stewart. Rest in peace. Thank you for all the years of laughter," Day captioned along with a clip of the actress from the show, along with "RIP TV mom. Thanks for 20 years of laughs. You deserve a standing ovation."
Stewart's early carrer included appearing as a nurse on M*A*S*H, a guest spot on Night Court and recurring roles on Laverne * Shirley. The actress also made an appearance in the film American Graffiti in 1973 and The Running Man in 1987. The actress also made appearances on comedic actress Tracey Ullman's sketch comedy specials for HBO and Showtime, as well as multiple appearances on Comedy Bang! Bang! and various voice acting roles.