Spike Lee's 'BlackKkKlansman' Soundtrack to Feature Unreleased Prince Song 'Mary Don't You Weep'

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Prince performs onstage during the American Idol Season 5 Finale on May 24, 2006 at the Kodak Theatre in Hollywood, Calif. 

An unreleased Prince song will be featured in Spike Lee's upcoming film BlacKkKlansman. The legendary director's latest film is due for release on Aug. 10 and follows the real story of Ron Stallworth, an African American detective who infiltrated the Ku Klux Klan during the 1970's.

In an interview with Rolling Stone, Lee, who frequently uses music to punctuate the drama in his films, confirmed that had secured the use of the unreleased Prince track "Mary Don't You Weep," which will play during the film's end credits.

"I knew that I needed an end-credit song," Lee explained. "I've become very close with Troy Carter, one of the executives at Spotify [and a Prince estate advisor]. So invited Tory to a private screening. And after, he said, 'Spike, I got the song.' And that was 'Mary Don't You Weep,' which had been recorded on cassette in the mid-80s."

Lee added that, "Prince wanted me to have that song, I don't care what nobody says. My brother Prince wanted me to have that song. For this film. There's no other explanation to me. This cassette is in the back of the vaults. In Paisley Park. And all of a sudden, out of nowhere, it's discovered? Nah-ah. That ain't an accident."