Harington will portray Dane Whitman, the non-Eternal Marvel hero known as the Black Knight. Chan will portray the heroic Eternal Sersi, and Keoghan will portray Druig, a villainous Eternal.
Created by Jack Kirby, the Eternals are a race of immortal, super-powered beings who were created by the Celestials. Although they've been alluded to in other MCU films, this movie will mark their Marvel Cinematic Universe debut.
Based on an older character and concept created by Stan Lee and Joe Maneely in the '50s, the modern Black Knight, Dane Whitman was created by Roy Thomas and George Tuska in 1967's Avengers #47. After inheriting the Ebony Blade, a cursed mystical sword, Whitman became the heroic Black Knight and joined the Avengers to restore honor to his family.
Both Black Knight and Sersi served on the Avengers together in the '90s, where they had a somewhat tumultuous romantic relationship.
Directed by Chloé Zhao with a screenplay by Matthew and Ryan Firpo, Eternals stars Richard Madden as Ikaris, Kumail Nanjiani as Kingo, Lauren Ridloff as Makkari, Brian Tyree Henry as Phastos, Salma Hayek as Ajak, Lia McHugh as Sprite, Don Lee as Gilgamesh and Angelina Jolie as Thena. The film arrives in theaters on November 6, 2020.