A white-tie dinner is the most formal category of evening event, requiring white bow ties and tailcoats for men and full-length gowns, often with tiaras, for women. State banquets at Windsor Castle are white-tie occasions. The dinner held in St George’s Hall for the Sultan of Oman in October 2026 followed this dress code, pairing maximum ceremony with the serious diplomatic conversation that state visits are designed to produce.
(Ian Jones / Wikimedia Commons (CC BY 2.0))
Mentioned in: Kate Middleton Dips into a Curtsy at Start of State Visit, But Not to King Charles or Queen Camilla