For Mick Jagger, having Get On Up made was a passion project.
The Rolling Stones singer got the long-stalled movie up and going after seeing the script. He produced it with Hollywood big gun Brian Grazer, who has dabbled in biopics before, such as A Beautiful Mind, and the music on Eminem's 8 Mile.
Read more anout the man who plays James Brown
Get On Up depicts the time when the young Rolling Stones performed with Brown in 1964 - they got top billing above Brown at the T.A.M.I (Teenage Awards Music International) in Los Angeles, which enraged the legend.
Despite their past differences, Jagger and Brown remained friends for many years.