In Queensland your Will is no longer valid once you marry (or divorce) or enter into a de facto partnership (or its termination). See section 14 or 14A of the Succession Act 1981. There are some exceptions, including if the Will is made in contemplation of the marriage (even if this is not expressly stated). The problem is that your beneficiaries might be required to prove this. Keep in mind that if a Will made before marriage is set-aside, your estate may devolve according to the rules of intestacy to a different set of Beneficiaries. By schedule 2 to the Succession Act 1981 a surviving spouse inherits the whole estate. So, you might end up with aggrieved beneficiaries and a long legal fight if there is a question over whether the Will was made in contemplation of marriage or not. The solution is to update your Will after every major life event or every few years.