Paul Ruebens is revealing his true self in the two-part posthumous documentary, 'Pee-Wee as Himself,' streaming on HBO May 24.
The actor died in July at age 70.
Jimmy Kimmel, Jane Lynch, Conan O'Brien and more stars remember the way Reubens never forgot a birthday.
Paul Reubens, in character as Pee-wee Herman, chatted with ET in 1984 about his character's popularity.
Paul Reubens died at 70 following a private battle with cancer. Watch rarely seen ET interviews with the Pee-wee Herman actor.
Pee-wee Herman actor Paul Reubens has died at the age of 70, following a six-year battle with cancer.
The comedic legend had secretly been battling cancer, it was revealed on Monday.
The comedian privately battled cancer for six years.
