One of the two choirs performing at Prince William and Kate Middleton's wedding, the other being The Choir of Westminster Abbey. During the wedding service, both choirs will be given direction from James O'Donnell, Organist and Master of the Choristers at Westminster Abbey.

The Chapel Royal Choir is made up of ten Children of the Chapel and six Gentlemen-in-Ordinary. The Children of the Chapel all hold scholarships at City of London School; the Gentlemen-in-Ordinary are professional singers. The Chapel Royal Choir sing at weekly services in the Chapel Royal at St. James's Palace. They also perform at other sovereign occasions.