A new "Rocky" documentary is on its way -- and it's narrated by the Italian Stallion himself, Sylvester Stallone. "40 Years of Rocky: The Birth of a Classic" will delve into the role that made the Hollywood actor a star, as he recalls his experience working on the original "Rocky" movie.

Written and produced by Derek Wayne Johnson, the behind-the-scenes documentary offers an "emotional" and "intimate" look into the making of the sports drama, four decades after the first episode's release in 1976.