By CBS3 Staff

PHILADELPHIA (CBS) — A new documentary chronicles the behind-the-scenes journey of the Philly-based classic film “Rocky.” Sylvester Stallone narrates the documentary about the making of the film which received the Academy Award for Best Picture in 1977.

Fans will also get a first look at never before seen rehearsal footage.

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“40 Years of Rocky” is now available for digital download and streaming on iTunes, Apple TV, Amazon, GooglePlay and