Miss. Code Ann. § 91-5-1: Who may execute; signature; attestation.

Every person eighteen (18) years of age or older, being of sound and disposing mind, shall have power, by last will and testament, or codicil in writing, to devise all the estate, right, title and interest in possession, reversion, or remainder, which he or she hath, or at the time of his or her death shall have, of, in, or to lands, tenements, hereditaments, or annuities, or rents charged upon or issuing out of them, or goods and chattels, and personal estate of any description whatever, provided such last will and testament, or codicil, be signed by the testator or testatrix, or by some other person in his or her presence and by his or her express direction. Moreover, if not wholly written and subscribed by himself or herself, it shall be attested by two (2) or more credible witnesses in the presence of the testator or testatrix.