Light opera is a theatrical genre that combines elements of music, singing, and acting, typically featuring light-hearted themes and engaging melodies. It often includes spoken dialogue and is less formal than traditional opera, making it more accessible to a wider audience. This genre gained popularity in the 19th century, with notable composers like Gilbert and Sullivan leading the way. Their works, such as The Mikado and H.M.S. Pinafore, exemplify the charm and wit characteristic of light opera, blending humor with catchy tunes and entertaining stories.