Monsters V Aliens Cast File

: Voiced by Kiefer Sutherland . The military leader in charge of the top-secret monster containment facility [10, 24].

: Voiced by Hugh Laurie . A brilliant mad scientist who accidentally gave himself the head and abilities of a cockroach [10, 36]. Monsters V Aliens Cast

: Voiced by Rainn Wilson . The main antagonist, an evil alien overlord seeking the "quantonium" inside Susan [10, 32]. : Voiced by Kiefer Sutherland

For the TV series spin-off , several roles were recast, with Riki Lindhome taking over as Susan and Chris O'Dowd as Dr. Cockroach [8, 11]. A brilliant mad scientist who accidentally gave himself

: Voiced by Will Arnett . A 20,000-year-old "fish-ape" humanoid who was thawed out by scientists [10, 32].

: A massive mutated larva. The character's vocal effects were provided by the film's co-director, Conrad Vernon [10, 20]. Human and Alien Characters