Charli XCX is trading in a microphone for a medieval string instrument in the new teaser trailer for the upcoming film 100 Nights of Hero. The first teaser for the film dropped on Tuesday, and though Charli is only seen for a few seconds, her appearance already has fans going wild. 100 Nights of Hero will then hit U.S. theaters on December 5, with no U.K. premiere date yet. Charli will star alongside a leading cast comprised of Maika Monroe, Emma Corrin, Nicholas Galitzine, Felicity Jones, and Richard E. Grant. 100 Nights of Hero is based on the popular graphic novel by Isabel Greenberg, which is loosely inspired by the Middle Eastern folktale collection One Thousand and One Nights, otherwise known as The Arabian Nights.