Washington DC, Feb. 22 -- Lynne Marie Stewart, the actor best known for her iconic role as Miss Yvonne in Pee-wee's Playhouse and appearances in It's Always Sunny in Philadelphia, has passed away at the age of 78, as reported by Variety.

Stewart became a beloved figure through her portrayal of Miss Yvonne in the Pee-wee franchise, which included appearances in The Pee-wee Herman Show (1981), Pee-wee's Big Adventure (1985), Pee-wee's Playhouse (1986-'90) Big Top Pee-wee (1988), Christmas at Pee-wee's Playhouse (1988) and Pee-wee's Big Holiday (2016).

Several film stars and celebrities condoled Lynne Marie Stewart's demise. 'Elvira' star Cassandra Peterson was one of several to pay tribute to the actress on Instagram after they met at The...