Guest Stars Keith David voices The President Lisa Kudrow voices Tyrannosaurus Rex God Jason Mraz voices Brachiosaurus God Co Starring Brandon Johnson voices Mr. Goldenfold Lee Harting voices Additional Voices Nicholas Rutherford voices Additional Voices James Adomian voices Additional Voices Lauren Hillman voices Additional Voices Dan Harmon voices Triceratops God Nolan North voices Anderson Cooper Nolan North voices Tom Hanks Chris Edgerly voices Additional Voices Reagan Gomez-Preston voices Additional Voices