With an original soundtrack by Sia and Scott Walker, Vox Lux features Natalie Portman as Celeste, a young woman whose traumatic experience at a school shooting inspires her to write a song that launches her to global pop stardom in the Madonna-Lady Gaga idiom. This trailer features two versions of a song called “Wrapped Up,” co-written by Sia and Greg Kurstin. One version is performed by Portman in full-glam regalia, the other by Raffey Cassidy who plays the singer as a teen.

When the moving ballad Celeste writes and performs at her classmates’ memorial goes viral, she is swept up in global stardom, under the influence of a determined manager of questionable scruples (Jude Law).

Sia also served as one of the film’s executive producers. The enigmatic Australian singer’s songs have also been in 2017’s Wonderwoman (“To Be Human”) and  My Little Pony: The Movie (“Rainbow”) and 2010’s Twilight Saga: Eclipse (“My Love”), while her 2004’s hit “Breathe Me” from the album Color the Small One has graced TV shows from to CSI: Miami Vice to Veronica Mars.

Portman, a 37-year-old Oscar-winner (for 2010’s The Black Swan), told USA Today the role was “kind of a childhood dream, with a hairbrush in front of the mirror.” As Celeste, a foul-mouthed pop icon,

Walker is a session musician who rose to stardom in the 1960s as part of pop trio the Walker Brothers. He made something of a comeback in 2006 with an avant-garde album, The Drift, that was well-received by music critics. In 2014, he teamed-up with Sunn O))), a metal drone band, o on the album Soused.

Vox Lux, directed by Brady Corbet, opens Dec. 7. Produced by Killer Films and distributed by Neon, it had its world premiere at the Venice Film Festival in September. Columbia Records and Three Six Zero Recordings will release the soundtrack Dec. 14.