William Relton began his career as an actor and made his professional début playing the title role in Rattigan’s The Winslow Boy in the West End in a cast which included Kenneth Moore, Megs Jenkins, Annette Crosbie, and Laurence Naismith. 

Major stage roles in London’s West End included Cherubin in Beaumarchais’s The Marriage of Figaro, Kenneth in Berlin’s Call Me Madam and Ralph Rackstraw in HMS Pinafore. Elsewhere, William has performed in Bernstein’s Candide (title role) and Tony West Side StoryMarco in Gilbert & Sullivan’s The GondoliersHamlet (title role), Wilfred Owen in the one-man play All the Arts of Hurting, and Television engagements included roles in Clayhanger, Play for Today, The Lost Boys and Degrees of Error. Film appearances have included roles in Beauty and the Beast, The Great Gastby and Slumdog Millionaire.

His roles on the operatic stage have included Don Ottavio Don GiovanniBasilio Le nozze di Figaro and Tisbe in La cenorentola. He has recently played the acting role of Haushofmeister in Ariadne auf Naxos at Glyndebourne Festival and the Frankfurt Opera.