Cast and credits of Treehouse of Horror XXVI (2015)

Dan Castellaneta
Homer Simpson / Abraham Simp-san / Homerzilla / Mayor Quimby / Krusty the Clown / Abraham Simpson / Kodos (voice) (as Dan 9 From Outer Space-Eta)

Julie Kavner
Marge Simpson (voice) (as Gooey Kavner)

Nancy Cartwright
Bart Simpson (voice) (as Nightmare-Nancy Scar-Fright)

Yeardley Smith
Lisa Simpson (voice) (as Yeard-Sale Smith)

Hank Azaria
Moe Szyslak / Comic Book Guy / Professor Frink / Disco Stu / Gary Chalmers / The Grumple / Kirk Van Houten / Apu Nahasapeemapetilon / Snake Jai

Harry Shearer
Principal Skinner / Clancy Bouvier / Otto Mann / Kang (voice) (as Corey Engineerer)

Kelsey Grammer
Sideshow Bob (voice) (as Kilmer Ghoulsman)

Chris Wedge
Scrat (voice) (as Chris 'Scrat' Wedge)

Pamela Hayden
Milhouse Van Houten (voice) (as Hannibal Hayden)

Tress MacNeille
Kumiko Nakamura / News Reporter / Dolph Starbeam / Wendell Borton (voice) (as Terror MacNihil)

Chris Edgerly
(voice) (as Burnt To A Crisp Deadgerly)

Maggie Roswell
Elizabeth Hoover / Luann Van Houten (voice) (as Maggie 'LAlien' Roswell)

Larina Jean Adamson