In musical drama Sing Street, Lucy Boynton played the love interest to a burgeoning musician, played by Ferdia Walsh-Peelo. In musical drama Bohemian Rhapsody, Boynton played the love interest-turned-life partner of musical superstar Freddie Mercury, played by Rami Malek. Now, finally, Boynton gets to lead her own musical drama -- one based on the incredible story of Marianne Faithfull. As reported on by Deadline, Boynton will both star in and executive produce the as-of-yet untitled film about Faithfull, the first time Boynton has ventured into producing. If you don't know anything about Marianne Faithfull, her …