A tailcoat, traditionally known as a morning suit, is a popular choice for gents in a wedding party and is becoming more and more fashionable for Royal and celebrity weddings. It is compiled of a number of items and design styles. The jacket is cut longer than a typical suit jacket, with a longer back, worn with either striped grey trousers, or matching suit trousers.
A waistcoat is usually chosen, often matching the tailcoat or in a contrasting colour, and double breasted waistcoats are now very popular, it would be finished with a white dress shirt and any choice of neckwear.