Castle on the Hill (Country Club Martini Crew Remix) Ed Sheeran
A new official royal wedding app which offers a 3D tour of Westminster Abbey is to be released.
Mobile phone users will be able to take a virtual stroll through the ancient church, starting at Great West Door - the point where Kate Middleton will begin her walk down the aisle to meet Prince William.
Abbey 3D, featuring an internal scaled replica of the 1000-year-old Abbey, uses revolutionary laser scanning technology and 3D modelling.
Proceeds from its sale will be split between William and Kate's Charitable Gift Fund and the Westminster Abbey Foundation.