Rob Paulsen
Gramps / Alien Co-Pilot / Mule (voice)
Charlie Adler
Wimpy Alien / Alien Dad / Terrified Man / Alien Grandpa (voice)
Neil Dickson
Alien Leader / Sphinx (voice)
Julienne Davis
President (voice)
Kath Soucie
Girl / Alien Kid #1 (voice)
Christine Cavanaugh
Boy / Alien Kid #2 (voice)
