Jason Isaacs is an English actor who is best known for portraying Lucius Malfoy in the Harry Potter films. He has also acted in several DC Entertainment productions, providing the voice for Ra's al Ghul in Batman: Under the Red Hood, Lex Luthor in Justice League: Gods and Monsters, Superman in the animated adaptation of Superman: Red Son, and Alfred Pennyworth in Batman Unburied. He also provided the voice for Brainiac in the 2024 video-game Suicide Squad: Kill the Justice League.