Danny Jacobs
King Julien (voice) (65 eps)
Jeff Bennett
Horst / Hector / Willie / Sage (voice) (65 eps)
India de Beaufort
Clover / Crimson (voice) (65 eps)
Kevin Michael Richardson
Maurice (voice) (65 eps)
Andy Richter
Mort / Ted (voice) (65 eps)
Debra Wilson
Masikura (voice) (65 eps)
Betsy Sodaro
Xixi (voice) (65 eps)
Sarah Thyre
Becca / Dorothy (voice) (65 eps)
David Krumholtz
Timo (voice) (23 eps)
Diedrich Bader
Abner (voice) (17 eps)
David Koechner
Nurse Phantom (voice) (11 eps)
Henry Winkler
Uncle King Julien (voice) (11 eps)
Bill Fagerbakke
King Joey (voice) (9 eps)
Rob Paulsen
Brodney (voice) (9 eps)
Dwight Schultz
Karl (voice) (9 eps)
JB Blanc
Benson / Mountain Lemur Captain (voice) (8 eps)
John Michael Higgins
Barty (voice) (7 eps)
Anjelica Huston
Julienne (voice) (7 eps)
Maurice LaMarche
Koto (voice) (3 eps)
Grey DeLisle
Pam / Eloise (voice) (3 eps)
H. Jon Benjamin
Fred the Giant Scorpion (voice) (2 eps)
Kether Donohue
April (voice) (2 eps)
Barbara Heller
Parrot (voice) (2 eps)
James Urbaniak
Lemur #1 (voice) (1 eps)
Lance Henriksen
Doc Sugarfoot (voice) (1 eps)
John DiMaggio
Jumping Rat #1 / Jumping Rat #2 / Jumping Rat #3 (voice) (1 eps)
Susanne Blakeslee
Butterfly Queen (voice) (1 eps)
Ellie Kemper
Karen (voice) (1 eps)
Kari Wahlgren
Female King Julien (voice) (1 eps)
Lance Barber
Bruce (voice) (1 eps)
Max Greenfield
Kipper (voice) (1 eps)
Glen Powell
Trent (voice) (1 eps)
Frank Welker
Grandpa Mort (voice) (1 eps)
Crispin Freeman
Alex (voice) (1 eps)