'Bone Tomahawk' trivia and fun facts

It was shot in 21 days.

Jim Broadbent replaced original cast member Richard Jenkins for a few months when the project was delayed. Jenkins was then recast in his role.

The final movie represents the first draft of the script.

S. Craig Zahler wrote the script in 2007.

When the movie was officially announced in October 2012, Peter Sarsgaard and Jennifer Carpenter were set to play the O'Dwyers