Patrick Schwarzenegger Joins HBO Max's True-Crime Series 'The Staircase'

Patrick Schwarzenegger is taking on a new project.

The 27-year-old Moxie and Midnight Sun has signed on to join the star-studded cast of The Staircase at HBO Max, Deadline reports.

The upcoming series is based on the docu-series of the same name and follows the real case of Michael Peterson, who was accused of murdering his wife Kathleen in 2001.

Colin Firth is set to play Michael Peterson while Toni Collette will star as Kathleen. It was announced earlier this month that Sophie Turner had also joined the show and would be playing Margaret Ratliff, one of Michael Peterson’s adopted daughters.

The cast also includes Juliette Binoche, Rosemarie Dewitt, and Parker Posey.

Patrick was spotted out and about with his longtime girlfriend Abby Campion a few months back. Check out the photos here!