Rebecca Thomas has been tapped to direct Malignant, a sci-fi action-thriller that James Wan is producing for 20th Century Fox.

Malignant is based on a Boom! Studios comic titled Malignant Man that Wan co-created. Boom!’s Ross Richie and Stephen Christy are producing with Wan, who is working via his Atomic Monster label. 

The story focuses on Alex Gates, a patient dying of a terminal disease who is resigned to his fate … until it’s discovered that his malignant tumor is actually a mysterious alien parasite. Now imbued with some incredible powers and a renewed purpose, Gates is tasked with fighting a secret army lurking behind the veils of society while also peeling back his own secrets.

Zak Olkewicz wrote the script for the adaptation.

Adam Yoelin of Boom! is co-producing. Matt Reilly is overseeing for Fox.

Brad Peyton was previously attached to direct but departed to work on New Line’s Rampage.

Thomas' feature debut was 2012 indie Electrick Children, and she has been poised for a breakthrough since she nabbed the gig to direct a live-action retelling of The Little Mermaid for Universal as well as adapting the John Green book Looking for Alaska for Paramount. Both are still in development.

Thomas, who is repped by CAA and Circle of Confusion, has the unique distinction of being one of only two people outside the Duffer brothers and Shawn Levy to direct an episode of Netflix’s Stranger Things, the other being Wall-E director Andrew Stanton.

In June, Fox acquired a minority stake in Boom!, making it part owner of the comic publisher.