 That same year he sang the role of Marcello in "La bohème" at the Opera Company of Philadelphia opposite Pavarotti as Rodolfo.Mijailovic's career quickly took off, and by 2000 he had already sung leading parts at La Scala, La Fenice, the Kirov Opera, the Festival della Valle d'Itria, the Festival de Ópera de Las Palmas, the Festival de Radio France et Montpellier, the Festival Settimane Musicali di Stresa, the Prolirica in Lima, and the National Theatre in Belgrade among others.He has continued to sing roles at major opera houses internationally, in such parts as Alphonse XI in "La favorite", the Count di Luna in "Il trovatore", Don Carlo di Vargas in "La forza del destino", Erensto in "Il pirata", Escamillo in "Carmen", Ford in "Falstaff", Germont in "La traviata", Leandro in "The Love for Three Oranges", Orest in "Elektra", Rodrigue in "Don Carlos", and the title roles in "Eugene Onegin" and "Macbeth" among others.