Allison Janney Ms. Grunion (voice)
Stanley Tucci Leonardo da Vinci (voice)
Ariel Winter Penny Peterson (voice)
Leslie Mann Patty Peterson (voice)
Patrick Warburton Agamemnon (voice)
Zach Callison King Tut (voice)
Dennis Haysbert Judge (voice)
Stephen Colbert Paul Peterson (voice)
Karan Brar Mason (voice)
Stephen Tobolowsky Principal Purdy (voice)
Lake Bell Mona Lisa (voice)
Max Charles Sherman (voice)
Mel Brooks Albert Einstein (voice)
Ty Burrell Mr. Peabody (voice)
Steve Valentine Ay (voice)
Danny Elfman Original Music Composer
Thomas Lennon Italian Peasant #2 (voice)
Walt Dohrn French Peasant / Taxi Driver / Spartacus (voice)
Ava Acres Additional Voices (voice)
Scott Menville Additional Voices (voice)
Nicholas Guest French Peasant (voice)
Michelle Ruff Additional Voices (voice)
Joshua Sternin Thanks
Pat Musick Teacher (voice)
Tom McGrath Odysseus (voice)
Mitch Carter Additional Voices (voice)
Jadon Sand Additional Voices (voice)
Andy Nelson Sound Re-Recording Mixer
Robert Ben Garant Egyptian Spectator / Italian Peasant #1 (voice), Additional Dialogue
Joshua Rush Carl (voice)
Rif Hutton Additional Voices (voice)
Raymond Ochoa Additional Voices (voice)
Robert Cait French Guard (voice)
Jacqueline Pinol Additional Voices (voice)
Jess Harnell Abraham Lincoln / George Washington / Bill Clinton / Isaac Newton / New York City Cop (voice)
Michael McCullers Screenplay
Richard King Supervising Sound Editor, Sound Designer
Stephen Apostolina Additional Voices (voice)
Jim Passon Color Timer
Rob Minkoff Creepy Boy (voice), Director
Eva Bella Additional Voices (voice)
John Roesch Foley
Cullen McCarthy Kid (voice)
Kim Bubbs French Peasant (voice)
Steve Alterman Additional Voices (voice)
Luisa Leschin Additional Voices (voice)
Al Rodrigo Ajax (voice)
Edie Mirman Additional Voices (voice)
Alan Shearman Additional Voices (voice)
Donald Fullilove Additional Voices (voice)
Shane Prigmore Visual Development
Jackie Gonneau Additional Voices (voice)
Newell Alexander Additional Voices (voice)
Molly Jackson Additional Voices (voice)
David Cowgill Additional Voices (voice)
Michael Miller ADR & Dubbing
Lynnanne Zager Additional Voices (voice)
Jeff Fischer Additional Voices (voice)
Bill Abbott Supervising Music Editor
Anna Noakes Musician
Blake Bertrand Additional Voices (voice)
Christi Soper Hilt Casting
Chris Bacon Additional Music
Alyson Dee Moore Foley
Leslee Feldman Casting
Leila Birch WABAC Machine (voice)
Rachel Bolt Musician
Jason Clark Executive Producer
Rosemary Alexander Additional Voices (voice)
Hannah Sherman Lighting Artist
Hope Levy Additional Voices (voice)
Eric Ellenbogen Executive Producer