Haydn Cox biography Haydn Cox is an emerging English singer, songwriter and actor. He's making his debut professionally in the West End, playing Jared/cover Connor/ensemble in Dear Evan Hansen at the Noel Coward Theatre. Training: Haydn trained at the Trinity Laban Conservatoire of Music and Dance. Music: He has released singles like Prove Me Wrong, Reflections and Just Let Me Know. He also does live vocal and piano shows, which includes Haydn Tonight and Contemporary Keys. Other Credits: Haydn's and skills also make him the Lyricist and Composer for the feature film Amnesiac, which is undergoing its pre-production phase. He was later involved in the USA tour of the World of Musicals, GFD Promotions.