Lynne Marie Stewart, known for her roles in Pee-wee’s Playhouse and It's Always Sunny in Philadelphia, passed away at 78 from a tumor near her liver and gallbladder. Her representative confirmed that Stewart experienced extreme exhaustion before her diagnosis. She gained fame as Miss Yvonne and Bonnie Kelly, and her career included appearances in American Graffiti and Bridesmaids. Stewart's last TV role was in AJ and the Queen. She was remembered for her kindness and acting talent.