An executor is the person named in a valid will to administer a deceased person’s estate: identifying, securing and realising assets, settling debts, taxes and expenses, and distributing the residue to beneficiaries under the will. Their authority derives from appointment in the will; in practice they must obtain a grant of probate (England & Wales, Northern Ireland and Ireland) or confirmation (Scotland) before dealing with most assets. Executors are fiduciaries and must act with due care, keep estate accounts, act impartially between beneficiaries, and avoid conflicts.Usage is broadly consistent across the UK and Ireland and is recognised in succession and probate legislation and case law. In England & Wales and Northern Ireland, “executor” sits within the wider concept of “personal representative”; if no executor is appointed or able to act, the court issues letters of administration to an administrator on intestacy or otherwise. Multiple executors may act; one may renounce or have power reserved; the chain of representation may apply.In Scotland, an executor named in a will is an executor-nominate; if none is available, the court appoints an executor-dative. Confirmation is required to ingather estate assets. In Ireland, similar principles apply under the Succession Act 1965 (grant of probate or letters of administration).