The dead female crew member, whose identity has not been released to the media, was struck while filming the movie on a trestle over the Altamaha River near the Doctortown Road crossing in Wayne County.
"All of us on the production team are devastated by the tragic accident that happened today. Our thoughts and prayers are with the family of our crew member," Midnight Rider Productions said in a statement to THR Thursday.
The mishap is under investigation.
Randall Miller is directing the film about the music icon from a script he co-wrote with Jody Savin. Tyson Ritter and William Hurt are playing Allman at different ages.