Comic opera, sometimes known as light opera, is a sung dramatic work of a light or comic nature, usually with a happy ending and often including spoken dialogue.
Forms of comic opera first developed in late 17th-century Italy. By the 1730s, a new operatic genre, opera buffa, emerged as an alternative to opera seria. It quickly made its way to France, where it became opéra comique, and eventually, in the following century, French operetta, with Jacques Offenbach as its most accomplished practitioner.
The influence of the Italian and French forms spread to other parts of Europe. Many countries developed their own genres of comic opera, incorporating the Italian and French models along with their own musical traditions. Examples include German singspiel, Viennese operetta, Spanish zarzuela, Russian comic opera, English ballad and Savoy opera, North American operetta and musical comedy.