Arnold (voice)
Phillip Van Dyke
Arnold Shortman
Spencer Klein
Helga Pataki (voice) / —
Francesca Smith
Gerald Johanssen
Jamil W. Smith
Harold Berman (voice) / —
Justin Shenkarow
Helga Pataki
Francesca Marie Smith
Guest Voice
Rick Corso
Guest Voice
Ashley Buccille
Guest Voice
Mayim Bialik
Guest Voice
Charles Adler
Guest Voice
Josh Evans
Guest Voice
Downtown Julie Brown
Guest Voice
Lori Alan
Guest Voice
Maria Bamford
Guest Voice
Joe Alaskey
Guest Voice
Dan Butler
Rhonda Wellington Lloyd (voice)
Olivia Hack
Guest Voice
Jacqueline Bisset
Guest Voice
Dan Castellaneta
Guest Voice
Kyle Gibson
Guest Voice
James Belushi
Guest Voice
Laraine Newman
Phoebe Heyerdahl (voice)
Anndi McAfee
Guest Voice
Sam Gifaldi
Guest Voice
Kathy Baker
Guest Voice
Michael Levin
Guest Voice
Henry Gibson
Guest Voice
Maurice LaMarche
Eugene Horowitz (voice)
Ben Diskin
Guest Voice
Ileen Getz
Guest Voice
Avriel Epps
Guest Voice
Phil LaMarr
Guest Voice
Charisma Carpenter
Guest Voice
Kath E. Soucie
Guest Voice
Rick Fitts
Guest Voice
Tress MacNeille
Guest Voice
James Keane
Guest Voice
Grant Hoover
Guest Voice
Phyllis Diller
Guest Voice
Dom Irrera
Guest Voice
Rebecca Forstadt
Guest Voice
John Mariano
Guest Voice
Candi Milo
Guest Voice
Pamela Hayden
Guest Voice
Nika Futterman
Guest Voice
Danielle Judovits
Guest Voice
Tony Jay
Guest Voice
Harvey Korman
Guest Voice
Chloe Webb
Guest Voice
Joe Lala
Guest Voice
Cameron Van Hoy
Eugene Horowitz (voice)
Blake McIver Ewing
Guest Voice
Kathie Lee Gifford
Guest Voice
Kathy Najimy
Guest Voice
Lou Rawls
Guest Voice
Sam McMurray
Guest Voice
Danny Mann
Guest Voice
Billy West
Guest Voice
John Rubano
Arnold (voice)
Lane Toran
—
Adam Wylie
Guest Voice
Lauren Robinson
Guest Voice
Rusty Flood
Guest Voice
Zelda Rubinstein
Guest Voice
Mary Scheer
Guest Voice
Charles Shaughnessy
Guest Voice
Cathy Moriarty
Guest Voice
Ryan Seacrest
Guest Voice
Craig Bartlett
Guest Voice
Steve Viksten
Guest Voice
Baoan Coleman
Guest Voice
Lloyd Sherr
Guest Voice
E.G. Daily
Guest Voice
Jordan Warkol
Guest Voice
Christopher Walberg
Guest Voice
Michael McKean
Guest Voice
Tim Wiley
Guest Voice
David Wohl
Guest Voice
Haley Joel Osment
—
Tony Jay
—
Shari Belafonte
—
Michael Welch
—
Ron Perlman