Dennis the Dog (voice)
Theodore Roosevelt
Dwight Eisenhower
Father Monaghan
Ramon / Lovelace (voice)
Self
Dan
Theodore Roosevelt
Self (archive footage)
Teddy Roosevelt
Ramon / Lovelace (voice)
Bob Munro
Fender (voice)
Walter Finch
Rainbow Randolph
Seymour Parrish
Dr. Know (voice)
Sean Maguire
Professor Philip Brainard
Genie (voice)
Armand Goldman
Alan Parrish
John Jacob Jingleheimer Schmidt (uncredited)
Dr. Kosevich
Daniel Hillard / Mrs. Doubtfire
Genie / Peddler (voice)
Peter Banning / Peter Pan
John Keating
Adrian Cronauer