I Capuleti e i Montecchi (The Capulets and the Montagues) is an Italian opera (Tragedia lirica) in two acts by Vincenzo Bellini. The libretto by Felice Romani was a reworking of the story of Romeo and Juliet for an opera by Nicola Vaccai called Giulietta e Romeo and based on the play of the same name by Luigi Scevola written in 1818, thus an Italian source rather than taken directly from William Shakespeare.