Tenn. Code Ann. § 32-1-107

A will executed outside this state in a manner prescribed by §§ 32-1-101 — 32-1-108, inclusive, or a written will executed outside this state in a manner prescribed by the law of the place of its execution or by the law of the testator's domicile at the time of its execution, shall have the same force and effect in this state as if executed in this state in compliance with those sections.