Did you know that early in is career Val Kilmer played Billy the Kid?
That was in 1989 when Kilmer was 30 years old.
It was a made for TV movie by Gore Vidal?!
Wikipedia: "Vidal said in his memoirs that he had written the original teleplay for The Left Handed Gun, (1958) starring Paul Newman as Billy the Kid, decades earlier, and always felt the studio had butchered the material when his television play was used as the basis for a theatrical movie, so he wanted to return to the story for a more accurate rendition. At the time of his original teleplay with Newman, it was thought that the real Billy was left handed. This was based on a photo of Billy that had been inadvertently flipped when printed. Years later, the error was discovered—Billy was right handed."
MFW: Tintype photos are often reversed and need to be flipped horizontally for an honest image.
While receiving little general attention, the television movie was acclaimed by fans of the Western genre due to its comparative historical fidelity.  Kilmer was praised [according to whom?] for his portrayal based on his extensive work to not only physically resemble William Bonney as much as possible,  but also to capture his personality as related in historical accounts. This contributed to the film being widely recognized as one of the most historically accurate "Billy the Kid" films ever made."
MFW: "", "[according to whom?]", "", ""... hmmm ...
Typical of anything (and everything) regarding The Kid,
it's all cloaked in mystery.
Kilmer has had an Up and Down career (to say the least.)
But along the way he's been in some notable Western style Movies.