A will does not become final until the death of the  Testator of  the will.   As long as the testator is mentally competent, he or she can changed the will.  In fact, a periodic review makes good sense. Changes in circumstances may suggest reasons for a revised will.  These include births, deaths, marriage, divorce, tax law amendments or changes in the nature and extent of property owned. For example, a will executed before marriage is not binding on the new spouse.  A husband or wife is entitled by law to a portion of the estate of the deceased spouse.  Therefore, a will drawn before marriage should be rewritten after the ceremony.