The True Grit and upcoming Ender's Game star will appear opposite Mark Ruffalo and Scarlett Johansson (reteaming from Marvel's The Avengers) in the romance, officially described as follows:
Seduced by dreams of making it in the big city, Gretta (Johansson) and her long-time boyfriend move to New York to pursue their passion for music. She’s heartbroken when he dumps her for the fame and fortune of a big solo contract, leaving Gretta all on her own. Her world takes a turn for the better when a down-on-his-luck record producer (Ruffalo) stumbles upon her singing in a local bar and is immediately captivated by her raw talent and inspiring authenticity - they may be each other’s last chance to turn their lives around. Somewhere between friendship and their love of music, the two strangers strike a chord that captures the hearts of everyone around them, proving that every great story has its own soundtrack.
Steinfeld will play the daughter to Ruffalo's character.
Carney, best known for Once, will be working with Grammy-award winning songwriter, Gregg Alexander (New Radicals), on the music for the film.