Codename: Kids Next Door

Ben Diskin

Numbuh 1 / Numbuh 2 (voice)

Lauren Tom

Numbuh 3 (voice)

Dee Bradley Baker

Numbuh 4 (voice)

Cree Summer

Numbuh 5 (voice)

Billy West

Richard Steven Horvitz

John DiMaggio

Big Brother (voice)

Brian Tochi

Greg Cipes

Charlie Schlatter

Eddie Deezen

Jill Talley

Tom Kane

Simon (voice)

Khary Payton

Gregg Berger

Maurice LaMarche

Father (voice)

Mark Hamill

Stickybeard / Sumo Wrestler / Pirate (voice), Stickybeard (voice)

Frank Welker

Professor XXXL (voice), Truck Driver (voice), Bus Driver (voice), Rainbow Monkey Kong (voice)

Rob Paulsen

(voice), Robin Food (voice), Mr. Washer / Chili Dog Vendor (voice)

Jason Harris

Chad Dickson (voice), Commander (voice), Numbah 274 (voice), (voice)

Rachael MacFarlane

Numbuh 362 (voice), (voice)

Josh Peck

Numbuh 50 Million B.C. (voice)

Kevin Michael Richardson

Dr. Lincoln (voice), Ice Cream Man / Ice Cream Beast (voice)

Jeff Bennett

Destructo Dad / Mr. Boss / Mr. Fizz (voice), Numbuh Jebediah (voice), (voice), Mr. Boss (voice), Hoagie Gilligan Sr. (voice), Sydney Beetles (voice)

James Arnold Taylor

King Sandy / Knight #2 / Guard #1 (voice), Eggbert Eggleston (voice)

Keone Young

Kani Sanban (voice)

Daran Norris

Joe Balooka (voice), Ed / Guard #1 / Lead Mustache (voice), (voice), Gooey (voice), Count Spankulot / Gooey / Ice Cream Man #2 (voice), Mr. Physically Fitastic / The Human Text (voice), Count Spankulot / Joe Balooka / Spankenstine Monster (voice), Maitre'd Violinist (voice), RAMON-4 (voice)

Grey DeLisle

Lizzie Divine (voice), Gramma Stuffum (voice), Crazy Old Cat Lady / Mega Mom (voice), Laura Limpin (voice), Grace / Lizzie Devine (voice), Mega Mom / Numbuh 66 (voice), Julie (voice)

Tom Kenny

Numbuh 30c (voice), Goof (voice), Fake Delightful Child from Down the Lane (voice), Mr. Wink (voice), Numbuh 30C (voice), Knightbrace (voice), Mr. Jelly / Knightbrace (voice), Numbuh 42 / Numbuh Ezekiel (voice), (voice), Narrator (voice), Chester (voice), Hoagie Gilligan IV (voice), Twin Boy / Vicious Dog (voice), Chester / President / Robber #1 (voice)

Carlos Alazraqui

The Kid / Pedestrian (voice), Numbuh 2x4 (voice)

Jess Harnell

Tony Clownarelli (voice)

Jason Marsden

Numbuh 80 (voice)

Jennifer Hale

Computer (voice), Mrs. Thompson / Robber #3 (voice), Mrs. Beetles (voice), Dixie / Runt (voice), Mrs. Uno (voice), (voice), Mrs. Thompson (voice), Numbuh 202 (voice), Numbuh 86 / Nurse Claiborne / Rainbow Monkey Chorus (voice), Stacey (voice)

Dave Wittenberg

Wintergreen (voice), Nick (voice), Numbuh 74.239 (voice), Ernest "Ernie" / Nick (voice)

Candi Milo

Nurse Jumbo (voice), Betty Gilligan / Grandma Lydia (voice), Lasso Lass (voice), Grandma Lydia (voice), Edna Jucation (voice), Henrietta Von Marzipan (voice), Madame Margaret (voice), Leona (voice), Betty Gilligan (voice), Leaky Leona / Mrs. Goodwall (voice)

Tara Strong

Mushi Sanban (voice), Mushi Sanban / Stewie (voice), Mushi Sanban / Numbuh 93 (voice), Pauley Marcus (voice), Sally Sanban (voice), Rainbow Monkey Tribesgirl #3 (voice)

Matt Levin

Hooves (voice)

Roger Rose

Little Juan (voice)

Roger L. Jackson

Bonko (voice)

Hynden Walch

Numbuh Rebecca (voice)