Stewart joined the cast of “It’s Always Sunny in Philadelphia” in 2005, at the beginning of the long-running show, which was ...

It’s Always Sunny in Philadelphia delivered one of its most hilarious and poignant episodes as Season 17 came to a close with ...

It’s Always Sunny in Philadelphia’s finale paid a heartfelt tribute to Lynne Marie Stewart, who played Bonnie Kelly. She appeared in a recurring role throughout many seasons after being introduced at ...

Major spoilers below for the Season 17 finale of It’s Always Sunny in Philadelphia, so be warned if you haven’t yet watched ...

Frank finds love on the finale, which features the final TV appearance of Lynne Marie Stewart, who played Charlie's mom.

(NEXSTAR) — Lynne Marie Stewart, well-known for her roles on “Pee-wee’s Playhouse” and “It’s Always Sunny in Philadelphia,” has died, according to multiple reports. She was 78.

Lynne Marie Stewart, who had supporting turns in "Pee-wee's Playhouse" and "It's Always Sunny in Philadelphia," has died, her friend Cassandra Peterson confirmed via Instagram Friday. She was 78.

Lynne Marie Stewart, who had supporting turns in “Pee-wee’s Playhouse” and “It’s Always Sunny in Philadelphia,” has died, her friend Cassandra Peterson confirmed via Instagram Friday.