Wyo. Stat. Ann. § 14-2-803

Parties to proceeding

(a) The following individuals shall be joined as parties in a proceeding to adjudicate parentage:

(i) The mother of the child; and (ii) A man whose paternity of the child is to be adjudicated.

Official source: Wyoming Legislature. Reproduced from public-domain Wyoming statutes; confirm against the official source for the current text. Not legal advice.