An In Contemplation of Marriage Clause in a Will is a provision that can be included in a will when an individual plans to get married in the future. This clause is designed to ensure that the will remains valid even after the individual's marriage, and that any inheritance provisions are protected.

Under UK law, a will is automatically revoked upon marriage, unless it was made in contemplation of the marriage. This means that if an individual creates a will before marriage, it will become invalid upon their marriage and their assets will be distributed according to the rules of intestacy.

The In Contemplation of Marriage Clause contemplates the future marriage and makes provision for any children or other beneficiaries that may be born or come into the individual's life as a result of the marriage. It can also address any changes in the individual's personal circumstances, such as their new spouse's financial situation or their relationship with their children.