Ben Stiller

Alex (voice)

Chris Rock

Marty (voice)

David Schwimmer

Melman (voice)

Jada Pinkett Smith

Gloria (voice)

Sacha Baron Cohen

Julien (voice)

Cedric the Entertainer

Maurice (voice)

Andy Richter

Mort (voice)

Tom McGrath

Skipper / Fossa / Panicky Man on Subway (voice)

Christopher Knights

Private (voice)

Chris Miller

Kowalski (voice)

Conrad Vernon

Mason (voice)

Eric Darnell

Zoo Announcer / Lemur #1 / Fossa / Subway Car Announcer (voice)

David Cowgill

Police Horse (voice)

Elisa Gabrielli

Old Lady (voice)

Stephen Apostolina

Police Officer (voice)

Devika Parikh

News Reporter (voice)

David P. Smith

Spider / Lemur #2 (voice)

Cody Cameron

Willie (voice)

Bob Saget

Zoo Animal (voice)

Jeffrey Katzenberg

Rico (voice) (uncredited)