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