Just like his father and his uncle, Prince Andrew, before him, Prince William has chosen a smart military uniform to welcome married life.
The 29-year-old will be every inch the dashing groom when he weds Kate Middleton wearing the famous red tunic of the Irish guards.
William became honorary colonel of the regiment - which recently returned from Afghanistan - in February.
In place of the bearskin hat, which is used on ceremonial occasions, the future king will wear a simple cap, bearing the Irish guard's motto, Quis Separabit (Who Shall Separate Us?), and gold sword slings, but without a sword.
As a Knight of the Order of the Garter – he received the honour in June 2008 to reflect his royal standing – William is entitled to wear the order's blue sash, with its attached medal and star, pinned to his chest.
He is also expected to proudly displayed his military honour – the Queen's Golden Jubilee Medal – and the Wings of the Royal Air Force, denoting the fact that he's an RAF pilot.
The last time that a royal groom married in red was in 1973 when Captain Mark Phillips – then an officer with the 1st Queen's Dragoon Guards – wed Princess Anne (pictured).
Many had anticipated that William would wear an RAF uniform in recognition of his present role serving as a helicopter pilot with the Search and Rescue Force in Anglesey.
But St James's Palace said that the Prince has chosen the red tunic of the Irish Guards since that was "his highest rank".
"If he had not gone for that he would have had to have chosen between his RAF and Household Cavalry uniforms and because he is a similar rank in both of those, it would have been quite a difficult decision," a spokesman said.
William's best man Prince Harry, will be no less dapper in his military ensemble. He will stand by his brother's side smartly dressed in the ceremonial uniform of the Blues and Royals' regiment – part of the Household Cavalry.
After graduating from Sandhurst, he became a tank commander with the regiment and was promoted to Lieutenant in 2008.
Although he is currently training to become an Apache helicopter pilot with the Army Air Corp, Harry, 26, is still a member of the Household Cavalry and is entitled to wear the dress.
His gold-brocaded uniform will also decorated with the Queen's Golden Jubilee Medal and his Afghanistan campaign medal, in recognition of the 10 weeks he spent serving in the war-torn country in 2008.
The boys' father Prince Charles, will wear the full Royal Navy Number One ceremonial uniform. This reflects his honorary rank as an Admiral, a position he has held since 2006.
William and Harry's grandfather, Prince Philip, meanwhile, will be attired in his Grenadier Guards uniform, featuring a scarlet tunic similar to the groom's.