The OutKast singer's portrayal of the late rock star comes with an official synopsis for the film, revealed by the Toronto International Film Festival.
The biopic, directed by John Ridley, will follow the height of Hendrix's career between 1966 and 1967, four years before his untimely death in 1970.
"Jimmy James, an unknown backup guitarist, left New York City for London, England in 1966," the official synopsis reads. "A year later he returned - as Jimi Hendrix.
"All Is By My Side brings authenticity and poignancy to the story of the man behind the legend, and of the people who loved and inspired him."
Imogen Poots, Hayley Atwell, Ruth Negga and Adrian Lester also star in the film.
All Is By My Side is due to debut at the Toronto International Film Festival in September.
In May 2012, the Jimi Hendrix estate said the film would not be possible without its full participation.
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