Boseman has been on Hollywood's to-watch list after playing Jackie Robinson, the first African-American professional baseball star in the U.S., in 42, which was a hit at the American box office earlier this year (13).
The actor is now preparing to tackle another superstar - the Godfather of Soul himself.
The Help director Tate Taylor will helm the as-yet-untitled project, which is being produced by rock legend Mick Jagger's film company.
The movie has been in the pipeline for more than a decade, with Eddie Murphy and Wesley Snipes both being linked to play Brown.
Brown, the outlandish performer behind hits including Papa's Got a Brand New Bag and (Get Up I Feel Like Being A) Sex MAChine, passed away in 2006 aged 73.