Stanley Tucci Leonardo da Vinci (voice)
Allison Janney Ms. Grunion (voice)
Dennis Haysbert Judge (voice)
Thomas Lennon Italian Peasant #2 (voice)
Patrick Warburton Agamemnon (voice)
Stephen Tobolowsky Principal Purdy (voice)
Scott C. Lemmer Animation
Ariel Winter Penny Peterson (voice)
Scott Menville Additional Voices (voice)
Leslie Mann Patty Peterson (voice)
Rajesh P.K. Lead Animator
Robert Ben Garant Egyptian Spectator / Italian Peasant #1 (voice), Additional Dialogue
Michael T. Chen Animation
Milton E. Rodriguez-Rios CG Supervisor
Pat Musick Teacher (voice)
Christi Soper Hilt Casting
Ty Burrell Mr. Peabody (voice)
Michael W. Mitchell Sound Effects Editor
Lake Bell Mona Lisa (voice)
Max Charles Sherman (voice)
Mel Brooks Albert Einstein (voice)
Carlos Felipe León Ortiz Visual Development
Stephen Colbert Paul Peterson (voice)
Danny Elfman Original Music Composer
John Roesch Foley
Joanna Lynne Smith Production Coordinator
Darci Zalvin Executive In Charge Of Production
Steve Valentine Ay (voice)
Alan Shearman Additional Voices (voice)
Jess Harnell Abraham Lincoln / George Washington / Bill Clinton / Isaac Newton / New York City Cop (voice)
Karan Brar Mason (voice)
Zach Callison King Tut (voice)
Jason Spencer-Galsworthy Supervising Animator
Riyad C.M. Animation
Bill Abbott Supervising Music Editor
Alyson Dee Moore Foley
Steve Mair Musician
Richard King Sound Designer, Supervising Sound Editor
Tom McGrath Odysseus (voice)
Andy Nelson Sound Re-Recording Mixer
Rif Hutton Additional Voices (voice)
Ava Acres Additional Voices (voice)
Michael Babcock Sound Re-Recording Mixer, Sound Designer, Supervising Sound Editor
Nicholas Guest French Peasant (voice)
Rob Minkoff Director, Creepy Boy (voice)
Sean Mahoney Animation
Walt Dohrn French Peasant / Taxi Driver / Spartacus (voice)
Michael Miller ADR & Dubbing
Jacqueline Pinol Additional Voices (voice)
Joshua Rush Carl (voice)
Jeff Fischer Additional Voices (voice)
Blake Bertrand Additional Voices (voice)
David Cowgill Additional Voices (voice)
Dennis Sands Scoring Mixer
Raymond Ochoa Additional Voices (voice)
Jim Passon Color Timer
Jadon Sand Additional Voices (voice)
Julie Rogers Thanks
Joshua Sternin Thanks
Roger Linley Musician
Mark Berrow Musician
Donald Fullilove Additional Voices (voice)
John Ashton Thomas Additional Music, Orchestrator
Luisa Leschin Additional Voices (voice)
Angela Ensele Modeling
Chris Bacon Additional Music
Jung Jin Song Master Lighting Artist
Eva Bella Additional Voices (voice)
Jessica Gallavan Dialogue Editor
David Yanover Post-Production Manager
Hope Levy Additional Voices (voice)
Anna Noakes Musician