Prince William may be married to Kate Middleton in an Irish Guards uniform in the “wedding of the century” on April 29.

On Thursday, February 10,  the 28-year-old prince received his first honorary Army appointment, when he became Colonel of the Irish Guards. He is replacing Major General Sir Sebastian Roberts in the position.

Prince William also has honorary ranks in the Royal Navy and RAF. Since 2006, he has served as Commodore-in-Chief of Scotland and Commodore-in-Chief of Submarines. In 2008, he became Honorary Air Commandant of RAF Coningsby.

Prince William’s grandmother, Queen Elizabeth, is the Colonel-in-Chief of all the Guards regiments, including the Irish Guards. Most of the major royals have at least one honorary rank in the Irish Guards regiment, which was formed in 1900 by Queen Victoria in thanks for their brave service in the Boer War.

The regiment has a strong presence in military ceremonials, but also serve on active duty. Many of the servicemen are currently serving in Afghanistan.

No one knows for sure which uniform Prince William will wear for the wedding, but the Irish Guards regiment is known for its uniform of bright red jackets, black trousers and tall black fur caps.