Denis Martin was a Northern Irish singer, actor and theatre producer active in the 1940s to 1980s. Martin won the All-Ireland tenor competition at Feis Ceoil in 1944, He then moved to England where he performed as a singer in musical shows and in radio and TV broadcasts. Soon after arriving in England Denis joined the Players' Theatre, a permanent music-hall company in London. In 1949 he played the juvenile lead in King's Rhapsody with Ivor Novello. He went on the become the Director of Production at the Players' Theatre, developing and adapting plays for musical theatre.Denis's brother Brendan joined him in London as a professional singer at the Windmill Theatre.