Maltese tenor who made his debut aged just 19, as Macduff in Verdi's Macbeth in Gozo.
In 1998, Calleja won the Caruso Competition in Milan and, a year later, was a prize winner in Plácido Domingo's Operalia International Opera Competition.
His recordings include 'La Traviata', 'Maria Stuarda' and 'I Capuleti e i Montecchi'.