A will which does not comply with W.S. 2-6-112 is valid as an holographic will, whether or not witnessed, if it is entirely in the handwriting of the testator and signed by the hand of the testator himself.
Wyo. Stat. Ann. § 2-6-113
Holographic will
Official source: Wyoming Legislature. Reproduced from public-domain Wyoming statutes; confirm against the official source for the current text. Not legal advice.