 She was the first British singer to perform this role, which she sang opposite Dietrich Fischer-Dieskau.Other roles, which she performed throughout many seasons included Oscar in "Un ballo in maschera", a performance which Montague Haltrecht, in his biography of the first ROH general administrator David Webster, describes as "the young Joan Carlyle makes a pageboy with a delicious vocal glitter"; Ascanius in "Les Troyens"; and Mimi in Peter Brook's staging of "La bohème" which resulted in a BBC Television production of the opera.At Glyndebourne in 1965 she played the Countess in "Le nozze di Figaro".