Ben Diskin (20)

Numbuh 1 / Numbuh 2 (voice)

Lauren Tom (41)

Numbuh 3 (voice)

Dee Bradley Baker (40)

Numbuh 4 (voice)

Cree Summer (33)

Numbuh 5 (voice)

Billy West (50)

Unknown

Richard Steven Horvitz (36)

Unknown

John DiMaggio (34)

Big Brother (voice)

Brian Tochi (39)

Unknown

Greg Cipes (22)

Unknown

Charlie Schlatter (36)

Unknown

Eddie Deezen (45)

Unknown

Jill Talley (39)

Unknown

Tom Kane (40)

Simon (voice)

Khary Payton (30)

Unknown

Gregg Berger (51)

Unknown

Maurice LaMarche (44)

Father (voice) /

Frank Welker (56)

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

Mark Hamill (51)

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

Rob Paulsen (46)

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

Jason Harris (33)

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

Rachael MacFarlane (26)

(voice) / Numbuh 362 (voice)

Josh Peck (16)

Numbuh 50 Million B.C. (voice)

Kevin Michael Richardson (38)

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

James Arnold Taylor (33)

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

Keone Young (55)

Kani Sanban (voice) /

Jeff Bennett (40)

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

Tom Kenny (40)

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

Grey DeLisle (29)

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

Carlos Alazraqui (40)

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

Daran Norris (38)

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