Kelly graduated from the Royal Opera House where she attracted attention for Zaida (Il turco in Italia), Javotte (Manon), Mercédès (Carmen), and Pisana (I due Foscari). Opera Today praised her Mirinda in L’Ormindo for its rich sensuality of voice and glowing warmth. Performances include Proserpina (Orfeo) at Roundhouse, Isolier (Le Comte Ory) with Opéra de Rennes and Opéra de Rouen Normandie, L’Eternità and Giunone in Cavalli’s La Calisto at Teatro Real, Mozart’s Requiem with the Ulster Orchestra, Rossini’s Sigismondo at Münchner Rundfunkorchester and performances at Wexford Festival Opera. Highlights include Idamante (Idomeneo) for Opera di Firenze, Annio (La clemenza di Tito) for Staatstheater Karlsruhe, Donna Elvira (Don Giovanni) with Northern Ireland Opera, Dorabella (Cosi fan tutte) and Annio (La clemenza di Tito) for Glyndebourne. She was Medarse (Siroe) for Nationale Reisopera, Nerone (Agrippina) with the ICO, Sesto (Giulio Cesare) with the Early Opera Company.