John Carney is an Irish film director, producer, screenwriter and lyricist who specialises in musical drama films. He is best known as the showrunner and executive producer of Modern Love on Amazon Prime Video, for his films Once, Begin Again, and Sing Street. He is also a co-creator of the Irish TV drama series Bachelors Walk.

Once is a 2007 Irish romantic musical drama film written and directed by John Carney. The film stars Glen Hansard and Markéta Irglová as two struggling musicians in Dublin, Ireland. Hansard and Irglová had previously performed music as the Swell Season, and composed and performed the film's original songs.