Sia is writing original music to soundtrack Vox Lux, an upcoming film starring Rooney Mara as a pop star. Directed by Brady Corbet, the drama will follow the rise of Mara’s character from 1999 to the present day. According to The Hollywood Reporter, Christine Vachon and David Hinojosa of Killer Films will produce alongside Brian Young of Three Six Zero Entertainment, and production will begin in February.