Lynne Marie Stewart, who starred in “Pee-wee’s Playhouse” opposite Paul Reubens, has died at 78.

The actor’s rep confirmed to USA Today that Stewart died after a tumor was found near her liver and gallbladder in mid-December. Prior to her diagnosis, she had been struggling with exhaustion.

“This was totally unexpected, and she passed a month or so after her diagnosis,” Smith said.

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