When The Kid awakens and sees Billy the Kid for the first time, Billy's pose closely duplicates the iconic photo which purports to be one of the very few of him. That photo shows Billy as left-handed, but it is a tintype, and therefore produces a reversed image. As a result, many movies featuring Billy have depicted him as left-handed.
Vincent D'Onofrio directs Ethan Hawk (Sheriff Pat Garrett) and Chris Pratt (Grant Cutler) in this movie. All three of them starred in The Magnificent Seven (2016) together.
Vincent D'Onofrio must love familiarity. Along with hiring family members and two of the stars from his recent appearance in 'The Magnificent Seven' (Ethan Hawke and Chris Pratt), D'Onofrio also hired Adam Baldwin, his costar from 'Full Metal Jacket' - in which they played the totally opposite characters of Animal Mother and Private Pyle.
Stafford Douglas played Billy the Kid in a 2014 episode of 'Gunslingers' on the American Heroes Channel.