Okla. Stat. tit. 84, § 84-114: Divorce or annulment as revoking will

A. If, after making a will, the testator is divorced, all

provisions in such will in favor of the testator's spouse so

divorced are thereby revoked. Annulment of the testator's marriage

shall have the same effect as a divorce. In the event of either

divorce or annulment, the testator's former spouse shall be treated

for all purposes under the will as having predeceased the testator.

Provided, however, this section shall not apply if the decree of

divorce or of annulment is vacated or if the testator remarries his

former spouse, or following said divorce or annulment, executes a

new will or codicil which is not revoked or held invalid.

B. This section shall apply to any will of a decedent dying on

or after November 1, 1987.