Stephen Fry will narrate one of the UK's first same-sex weddings which will be conducted in the form of a musical and broadcast by Channel 4.
Composer Benjamin Till and West End stage star Nathan Taylor are writing the entire ceremony as a musical with all the vows and readings to be sung.
Our Gay Wedding: The Musical will feature set-pieces from family and Fry said there will be appearances from "surprise guest stars and showbiz legends".
The QI quizmaster will introduce the 60-minute programme as well as adding his commentary.
John Hay, commissioning editor for arts, said, "We are proud to be marking a huge milestone for gay rights - a cause that has long been close to Channel 4's heart."