Everything you always wanted to know about Big Bird... the focus of a new film.

FOX News Radio's Jane Metzler has more: 

We've known his character for years... Now meet the man behind the beloved 8 ft tall yellow bird and his buddy, Oscar the Grouch. "I am Big Bird: The Carroll Spinney Story", a documentary out today on iTunes and video-on-demand, about the now 81-year-old actor and puppet master, who's breathed life into the "Sesame Street" staple since 1969.

(AP Photo/Mark Lennihan, File)
(AP Photo/Mark Lennihan, File)

The film to be released in theaters May 15th includes Spinney's personal videos from the show's earliest days, along with some heartbreaking recollections.

Spinney was NASA's first choice for its civilian in space program, bumped from the 1986 Challenger flight by teacher Christa McAuliffe. He watched in horror as the shuttle blew up.

Jane Metzler, FOX News Radio.