New Line on Thursday rolled out the first trailer for The Lord of the Rings: The War of the Rohirrim, its anime taking place 183 years before the events of the live-action LOTR trilogy, which is likewise based on the books by J.R.R. Tolkien.

Starring Succession‘s Brian Cox, Gaia Wise (A Walk in the Woods), Luke Pasqualino (Snowpiercer), LOTR franchise veteran Miranda Otto and more, the Warner Bros film rolls out internationally beginning December 11 and is slated for release in the U.S. on December 13.

Directed by Kenji Kamiyama (Blade Runner: Black Lotus), The War of the Rohirrim tells the fate of the House of Helm Hammerhand (Cox), the legendary King of Rohan. A sudden attack by Wulf (Pasqualino), a clever and ruthless Dunlending lord seeking vengeance for the death of his father, forces Helm and his people to make a daring last stand in the ancient stronghold of the Hornburg — a mighty fortress that will later come to be known as Helm’s Deep. Finding herself in an increasingly desperate situation, Héra (Wise), the daughter of Helm, must summon the will to lead the resistance against a deadly enemy intent on their total destruction.

Produced by Oscar winner Philippa Boyens, Jason DeMarco and Joseph Chou, the film also features the voices of Lorraine Ashbourne (Bridgerton), Yazdan Qafouri (I Came By), Benjamin Wainwright (World on Fire), Laurence Ubong Williams (Gateway), Shaun Dooley (The Witcher), Michael Wildman (Fast and Furious Presents: Hobbs & Shaw), Jude Akuwudike (Beasts of No Nation), Bilal Hasna (Sparks) and Janine Duvitski (Benidorm).

Jeffrey Addiss & Will Matthews and Phoebe Gittins & Arty Papageorgiou penned the script, from a story by Addiss & Matthews and Boyens, based on Tolkien’s characters. Fran Walsh, Peter Jackson, Sam Register, Carolyn Blackwood and Toby Emmerich served as executive producers.

From Deadline.com