Moss and McDowell join rising star Adelaide Clemens (X-Men Origins: Wolverine); Kit Harington (Game of Thrones); and returning Silent Hill residents Radha Mitchell, Sean Bean, and Deborah Kara Unger.
Hadida said: "Carrie has displayed her enormous talent across all genres – from The Matrix Trilogy to Memento – and we are delighted for her to join the world of Silent Hill. She will certainly bring a new level of excitement to fans of the video game franchise."
Director Michael J. Bassett said: "Malcolm is quite simply an icon of modern cinema and I've been a fan since I was a teenager when I managed to see A Clockwork Orange. He has an amazing ability to bring new and unexpected dimensions to his characters and I know he will bring something unique and disturbing to Silent Hill."
Lionsgate is handling international sales on Silent Hill: Revelation 3D which is based on the acclaimed survival horror videogame franchise by KONAMI and is the sequel to Hadida and Carmody's earlier Silent Hill directed by Christophe Gans. For years, Heather Mason (Clemens) and her father (Sean Bean) have been on the run, always one step ahead of dangerous forces that she doesn't fully understand. Now on the eve of her 18th birthday, plagued by terrifying nightmares and the disappearance of her father, Heather discovers she's not who she thinks she is. The revelation leads her deeper into a demonic world that threatens to trap her in Silent Hill forever.