When Brady Corbet’s upcoming musical drama Vox Lux was announced early last year, musician Mica Levi, who scored Under the Skin and Jackie, was rumored to be working on the film. But some changes have been made since then. Natalie Portman has replaced star Rooney Mara, Sia has been recruited to provide original songs, and according to the Playlist, avant-pop experimentalist Scott Walker will be joining her to work on the music.

Walker previously scored another Corbet film, The Childhood Of A Leader, for which he received rave reviews. Vox Lux is about a young singer’s ascent to stardom. It will have its world premiere on 9/4 at the Venice Film Festival.