A Lost William Greaves Documentary Shot 50 Years Ago Is Finally Getting Its Theatrical Release as ‘Once Upon a Time in Harlem’ Trailer Is Revealed

Some films take years to find their way to audiences. Others take decades, buried in reels of unfinished footage until someone finally picks up the pieces and carries the vision across the finish line. “Once Upon a Time in Harlem” belongs firmly in that second category, having spent more than half a century waiting to reach movie theaters.

The documentary was conceived and shot back in 1972 by pioneering Black filmmaker William Greaves, best known for his groundbreaking 1968 work “Symbiopsychotaxiplasm.” Greaves considered this particular project his most important undertaking, but he spent much of the rest of his life wrestling with how to complete it, ultimately dying in 2014 with the film still unfinished.

Now, more than 50 years after Greaves first shot the footage, NEON has released the official trailer for “Once Upon a Time in Harlem,” confirming the long-awaited documentary will open in select theaters on October 16.

The film centers on a remarkable 1972 gathering Greaves organized at Duke Ellington’s Harlem townhouse, where he brought together as many surviving figures of the Harlem Renaissance as he could locate, many of whom hadn’t seen one another in more than 50 years. According to Deadline, the group spent four hours laughing, drinking, and debating their place in a rapidly shifting cultural landscape, all captured on 16mm film.

That footage sat largely dormant for decades following Greaves’ death, with his widow, Louise Greaves, continuing to work on the project until her own death in 2023. At that point, the mantle passed to their son, David Greaves, and his daughter, Liani Greaves, who finally completed the documentary and brought Greaves’ original vision to the screen.

Producer Anne de Mare oversaw the extensive restoration and digitization of the original footage, a process that proved essential to transforming decades-old material into a finished, theatrical-ready film. The result, according to Deadline, is described as a self-exploration and inquiry into the Harlem Renaissance’s cultural significance, examining how that creative period shaped generations that followed.

“Once Upon a Time in Harlem” has spent much of 2026 building buzz on the festival circuit well ahead of its theatrical release. The film premiered at Sundance before screening in Cannes’ Directors’ Fortnight section, and its run has continued through Telluride, TIFF, the BFI London Film Festival, and the New York Film Festival, where it’s scheduled to screen September 29 and 30.

Industry observers have noted that “Once Upon a Time in Harlem” is the only film this year to be programmed at Sundance, Cannes, Toronto, the New York Film Festival, and Telluride, an unusually broad festival footprint for any single title. NEON reportedly beat out competing distributors including Netflix, Sony Pictures Classics, MUBI, and the Criterion Collection to secure the film’s release rights.

The film’s October 16 release date carries additional significance, arriving shortly after what would have been William Greaves’ centenary on October 8. That timing frames the release as something of a tribute, closing the loop on a project the filmmaker considered his life’s most important work nearly 54 years after he first began shooting it.

With its extensive festival pedigree and decades-in-the-making backstory, “Once Upon a Time in Harlem” arrives as one of the more unusual theatrical releases of the fall season, offering audiences a rare chance to witness a piece of cultural history that almost never made it to the screen at all.

Have something to add? Let us know in the comments!