Lynne Marie Stewart, who is known as Miss Yvonne on Pee-wee’s Playhouse and Bonnie Kelly on It’s Always Sunny in Philadelphia ...

A beloved children’s television star is dead at age 78.

Pee-wee’s Playhouse" and “It’s Always in Sunny in Philadelphia" actress Lynne Marie Stewart has died at the age of 78, her ...

A rep for the actress told USA TODAY a tumor was found in December near her liver and she died "a month or so after her ...

Lynne Marie Stewart, the character actress known for her work on Pee-Wee's Playhouse and It's Always Sunny in Philadelphia, ...

As Pee-wee Herman, Paul Reubens was a performance artist hiding in plain sight in mainstream popular culture. His fictional character, a hyperactive, bow-tied man-child, provided subversive ...

Paul Reubens reveals the man behind his most well-known role, Pee-Wee Herman, in the new documentary series Pee-wee as Himself. During a party at his alma mater California Institute of the Arts ...

Paul Reubens reveals the man behind his most well-known role, Pee-Wee Herman, in the new documentary series Pee-wee as Himself. The two-part doc, directed by Matt Wolf and shown to Park City, Utah, ...

The actress has recently finished filming for another season of “It’s Always Sunny in Philadelphia” and her forthcoming ...

Stewart had a memorable role on the beloved comedy series “It’s Always Sunny in Philadelphia,” playing Charlie Kelly’s mother ...

"I got choked up when someone asked me about Paul Reubens [his friend and Pee-wee’s Big Holiday costar]," the actor tells PEOPLE in this week's issue. "It snuck up on me, I really do miss him.

Born Dec. 14, 1946 in L.A., Stewart was a member of The Groundlings in the ’70s, where she met Peterson, Paul Reubens and Phil Hartman. From left: Lynne Marie Stewart, Jimmy Smits and Paul ...