Sia's music is making its way into movie theaters in the upcoming musical called Von Lux. She wrote all the music for the film, which “follows the rise of ‘Celeste’ from the ashes of a major national tragedy to pop superstardom." Rooney Mara and Jude Law were originally attached to the project but Mara dropped out. Now, it’s been revealed that Natalie Portman will take over the lead role. Portman has already performed with Sia before singing backup along with Jimmy Fallon and The Roots for a rendition of “Iko Iko” in 2016.