Naughty Marietta is a 1935 American romantic musical film based on the 1910 operetta of the same name by Victor Herbert.

Five of Herbert's most famous songs come from the score of Naughty Marietta, with words by lyricist Rida Johnson Young: "Ah!

Sweet Mystery of Life", "Italian Street Song", "Neath the Southern Moon", "I'm Falling in Love with Someone" and "Tramp!

The film was written by Frances Goodrich, Albert Hackett, John Lee Mahin and Rida Johnson Young.

To avoid an arranged marriage to Don Carlos, an elderly Spanish duke, Princess Marie masquerades as her uncle's former servant, Marietta, and escapes from France on a ship with casquette girls who are traveling to New Orleans to marry colonists.

Shortly after, the ship is boarded by pirates, who kill the entire crew and take the girls ashore.

The mercenaries' leader, Captain Richard Warrington, sings "Neath a Southern Moon" to Marietta.

When she pretends to have a disreputable past, the governor orders a pair of soldiers to escort her away in disgrace.

Warrington relieves them of their duty and finds her a place to stay, even paying the first month's rent.

The gypsy leader, Rodolpho, has his daughter sing, and Warrington joins in ("Italian Street Song").

Marietta asks Julie to stop Warrington from coming, but they realize it is too late when they hear him and his men singing ("Tramp!