Lynne Marie Stewart, the veteran actress best known for her work on Pee-wee’s Playhouse and It’s Always Sunny in Philadelphia, among dozens of other projects, has died. She was 78. Stewart died Friday, according to a spokesperson for the comedy sketch troupe The Groundlings. The cause of death wasn’t immediately available.

Lynne Marie Stewart, a comedian and actress best known for appearing in Pee-wee’s Playhouse and It’s Always Sunny in Philadelphia, has died at 78, according to a report. Stewart’s death was confirmed Friday to The Hollywood Reporter by a spokesperson for her former sketch troupe,

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

The actor who played Charlie's mother in "It's Always Sunny in Philadelphia" and starred in "Pee-wee's Playhouse" died at age 78 on Friday, a spokesperson for the actress confirmed to CBS News.