Self (archive footage)
Coach Klein
Chef Ray
Nerd's Dad / Jason Bourne / Christmas Tree (voice)
Nerd's Dad (voice)
Himself
Self
Nathaniel Zib (voice)
Uncle Ralph
Chuck Lumley
Edward Crow
Self - Choir Member
Butchey Weinstein
Andy Schmidt
Party Guest (voice) (uncredited)
Larry Steinberg
Benedict Slade
Happy Herb
Jack Dunne
Marty Streb
Henry Winkler
Self - Uncredited
Mannie
Dad
Narrator
Bob Kline
Bob Weatherbee
Johnny Bernstein
self
John Quinn
Jack Potter
Uncle Al
Marty Klein
Smiley (voice)
Judge Newman
Ted
Stanley Warner
Self (Interviewee)
Carl Conway (voice)
Fullerton
Nathaniel Zib
Stanley Yelnats III
Ed Koch
Steven Moore
Sy
Various (voice) (archive sound)
Immigrant
Mr. Rock
Cliff Lawton
Limousine Passenger
Testimonial
Grandpa Bill (voice)
Himself / Arthur 'The Fonz' Fonzarelli
Uncle Joe
Self - Host (Television Version)
Dr. Cotton
Skip Fine
Burton
Auditioning Actor (uncredited)
Fonzie ("Buddy Holly") (archive footage)
Keith (voice)
Dr. Brenner
Principal Arthur Himbry (uncredited)
Tony
Arthur 'Fonzie' Fonzarelli (archive footage)
Arthur "The Fonz" Fonzarelli (archive footage)
Jepson (voice)
(archive footage)
Self - Guest
Lester Martin
Ramrod (voice)
Fonzie
Fergus McGarrity
The Scary Monster (voice)
Dr. Jack Slocum
Sy Mittleman
Norville (voice)
Edwin Todd
Arthur Fonzarelli
Dr. Henry Olson
Self - Audience Member (uncredited)
Dr. Stewart Barnes
Bailiff (voice)
Barry Zuckerkorn
Willard Deutschebog
Monty Richardson
Narrator (voice)
Steve Waldman
Professor Nathaniel Zib
Sal Monella (voice)
Dr. Saperstein
Personal Budget Expert
Boris (voice)
Boris / The Count / Mr. Friend Doll (voice)
Leonard Rascal
Uncle King Julien (voice)
Zenas Fisk Wilber
Melvin (voice)
Flip
Dr. Maniac (voice)
The Fonz (voice)
The Snowman (voice)
Gene Cousineau
Mall Santa (voice)
Alex's Dad (voice)
Captain Cool (voice)
Miles Lascoe
Principal (voice)
Self - Nominee
Marty Alexander
Wizard Longbeard (voice)
Wilton Newberry (uncredited)
Self - Panelist
Henry Winkler (voice)
Tatty
Fritz (voice)
Child Protection Services Agent (voice)
Wilhand Trickfoot (voice)
Senator Faxler
Nacho Cheese (voice)
Yeti (voice)
Mr. Newsome
Walter Dunleavy
Ambush Bug (voice)