On 29 September 1949 at St. Mark's Church, London, Lord Harewood married Marion Stein, a concert pianist and the daughter of the Viennese music publisher Erwin Stein. Because of Harewood's position in the line of succession, the marriage was subject to approval from the sovereign, under the Royal Marriages Act 1772. Queen Mary, mother of King George VI, objected to the marriage but permission was eventually granted. Benjamin Britten, a friend of the Stein family, composed an anthem, "Amo Ergo Sum", for the wedding ceremony.