Jagger had long wanted to bring Brown's life to the big screen but his dream only became a reality after the star's death in 2006.
Now the Brown Sugar hitmaker has revealed the delays came about because the legendary singer was too difficult to work with, and there were further holdups when Jagger had to deal with the executors of Brown's estate.
Jagger tells British newspaper The Daily Telegraph, "It was very difficult when he was alive because he kept changing his mind and he wanted this and he wanted that and didn't want too much negativity, which I totally understand. And after he died his estate became very difficult to deal with because there were so many of them. I don't think I'm talking out of turn to say there were disputes."
The Rolling Stones frontman is producing the movie in partnership with Academy Award winner Brian Grazer, and Brown will be played in the film by 42 star Chadwick Boseman.