Sylvester Stallone narrates upcoming ‘Rocky’ documentary

Sylvester Stallone narrates upcoming ‘Rocky’ documentary
Sylvester Stallone, left, and Jennifer Flavin arrive at the Oscars on Sunday, Feb. 28, 2016, at the Dolby Theatre in Los Angeles. (Source: Photo by Al Powers/Invision/AP)

(CNN) – The Italian Stallion is back for another round.

Sylvester Stallone narrated an upcoming documentary about the original “Rocky” movie titled “40 Years of Rocky: The Birth of a Classic.”

It’s a blend of “Rocky” director John Avildsen’s home movies, rehearsals and behind-the-scenes footage.

Stallone, who’s now 73, was a relatively unknown actor when he wrote the original “Rocky” screenplay and starred in the 1976 film.

The low-budget movie became a box office knockout, going on to win three Academy Awards including Best Picture.

It spawned seven sequels, the most recent being 2018's "Creed II.”

The documentary comes out digitally on iTunes/AppleTV and Amazon on June 9.

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