Nannerl, an accomplished harpsichordist and singer who helps support the family as part of a brother/sister act, yearns to compose music and play violin, but her father, Leopold, forbids it.

Princess Louise enters a convent and urges Nannerl to stay away from the Dauphin who is struggling to avoid the debauchery of his father, King Louis XV.

Mozart's Sister received generally positive reviews, holding a 75% rating on Rotten Tomatoes.

[3] In the United States, Mozart's Sister was released on DVD and Blu-ray Disc by Music Box Films.

Each DVD and Blu-ray Disc includes a music CD with the film's soundtrack, composed by Marie-Jeanna Serero.