Full cast of Happy Days
Don Most
Ralph Malph
166 episodes
Al Molinaro
Al Delvecchio / Al
132 episodes
Lynda Goodfriend
Lori Beth Allen / Lori Beth
78 episodes
Cathy Silvers
Jenny Piccalo
59 episodes
Hillary Horan
Girl Playing Drum (uncredited) / Girl in Red Scarf (uncredited) / Girl Playing Drums (uncredited) / Girl in Red Jacket (uncredited) / Daphne / Brunette in Red Jacket (uncredited) / Brunette Prom Girl in Blue (uncredited) / Brunette in Blue and White (uncredited) / Short-Haired Brunette (uncredited) / Brunette in Yellow Top (uncredited) / Brunette in Gray Skirt (uncredited) / Girl in Plaid Skirt (uncredited) / Brunette in White (uncredited) / Girl in Red Skirt (uncredited) / Birdhouse Girl in Green (uncredited) / Audience Member in Purple (uncredited) / Cheerleader on Fonzie's Left (uncredited) / Fonzie's Brunette - Green Skirt (uncredited) / Nurse Elaine / Girl Dancing with Ralph (uncredited) / Majorette (uncredited) / Brunette in Orange Skirt (uncredited) / Girl Playing Drums / Peggy / Dancer in Red (uncredited) / Brunette in Yellow Jacket (uncredited) / Girl in Maroon Scarf (uncredited) / Brunette in Plaid Skirt (uncredited)
37 episodes
Linda Purl
Ashley Pfister / Gloria
27 episodes
Pat Morita
Arnold
24 episodes
David Ketchum
13 episodes
Kevin Rodney Sullivan
Tommy
13 episodes
Billy Warlock
Flip Phillips
13 episodes
Heather O'Rourke
Heather Pfister
12 episodes
Ed Peck
9 episodes
Gavan O'Herlihy
Chuck Cunningham
8 episodes
Suzi Quatro
7 episodes
Dr. Logan / Army Sgt. Betchler / DJ Charlie The Prince / Movie Director / Mr. Vanburen
5 episodes
Teddi Siddall
4 episodes
Scott Marshall
4 episodes
Kathleen Marshall
4 episodes
Cynthia Windham
Teen Student / Teen at Arnold's
4 episodes
Jason Evers
3 episodes
Arthur Batanides
3 episodes
Frances Bay
Grandma Nussbaum
3 episodes
James Daughton
3 episodes
Roz Kelly
3 episodes
Tita Bell
Trudy
3 episodes
Alice Nunn
3 episodes
Michael Pataki
3 episodes
Misty Rowe
Wendy
3 episodes
Robin Williams
Mork
2 episodes
Rita Wilson
2 episodes
Marla Pennington
2 episodes
Marc McClure
2 episodes
Ralph Wilcox
2 episodes
Ray Girardin
2 episodes
Marcia Lewis
2 episodes
Michael Dudikoff
2 episodes
Peter Hobbs
2 episodes
Jack Baker
2 episodes
Pamela Dunlap
2 episodes
Martin Ferrero
2 episodes
Raymond Guth
2 episodes
Pat O'Brien
2 episodes
Randolph Roberts
Chuck Cunningham
2 episodes
Gino Conforti
Sticky
2 episodes
Joe Mays
2 episodes
Cliff Emmich
Candy Man
2 episodes
Lew Horn
2 episodes
Marjorie Bennett
Mrs. Harrison / Lady
2 episodes
Robert Casper
Orville / Customer
2 episodes
Meridith Baer
Judy
2 episodes
Jillian Kesner
Patty Petralunga / Lorraine
2 episodes
Robert DoQui
1 episode
Buffalo Bob Smith
1 episode
Didi Conn
Joyce
1 episode
Leon Askin
1 episode
Sue Ane Langdon
1 episode
Nellie Bellflower
1 episode
Christopher Knight
1 episode
Leslie Browne
1 episode
Helen Page Camp
Miss Wheaton
1 episode
Jeff Conaway
1 episode
Herb Edelman
1 episode
Ivor Francis
1 episode
Herbie Faye
1 episode
Barbara Rhoades
1 episode
Phillip Pine
1 episode
Michael Lembeck
1 episode
Stuart Nisbet
1 episode
Valerie Curtin
1 episode
Lennie Weinrib
1 episode
Joyce Brothers
1 episode
Karen Austin
1 episode
Shawn Weatherly
1 episode
Leslie Charleson
1 episode
Peter Brocco
Mr. Egan
1 episode
Virginia Gregg
Mrs. Nestrock
1 episode
Dean Devlin
1 episode
John Hart
1 episode
Ben Davidson
1 episode
Colleen Camp
1 episode
Jenny Sullivan
1 episode
H.B. Haggerty
1 episode
Rick Hurst
1 episode
Dana Kimmell
1 episode
Sherry Hursey
1 episode
Sarah Rush
1 episode
Rhonda Shear
1 episode
Ray Goulding
Bernie Cross
1 episode
Frank Ashmore
Johnny
1 episode
Lisa Pelikan
1 episode
Gary Grubbs
1 episode
Ralph Steadman
1 episode
Julie Brown
1 episode
Vito Scotti
Otto
1 episode
Kristoff St. John
1 episode
Vicki Frederick
1 episode
Linda Bove
1 episode
Laurence Lau
1 episode
Sam Edwards
Dr. Abner
1 episode
Lillian Bronson
1 episode
Kim Lankford
1 episode
Joshua Shelley
1 episode
James Randi
1 episode
Joseph Bova
1 episode
Jeffrey Kramer
1 episode
Rebecca Holden
1 episode
Elizabeth Keifer
1 episode
Sparky Marcus
1 episode
Happy Hairston
1 episode
Amy Irving
1 episode
Ken Osmond
1 episode
Anne Lockhart
1 episode
Bill Idelson
1 episode
Pat Crowley
1 episode
Maggie Roswell
1 episode
Amzie Strickland
1 episode
Audrey Landers
1 episode
Dave Madden
Jack Whippett
1 episode
Britt Leach
1 episode
M.C. Gainey
1 episode
Richard Paul
1 episode
Robert Pierce
1 episode
Jack Riley
Officer O'Reilly
1 episode
Bruce Kimmel
1 episode
Christopher Norris
1 episode
George Furth
Mr. Pinney
1 episode
Tony Longo
1 episode
Barney Martin
1 episode
Larry Poindexter
1 episode
Cheryl Ladd
Cindy Shea
1 episode
Conrad Janis
Mr. Kendall
1 episode
Hank Aaron
1 episode
Richard Stahl
1 episode
Bob Elliott
Gil Crawford
1 episode
Janis Paige
Angela
1 episode
Al Fann
1 episode
Tracie Savage
Marilyn
1 episode
Gary Morgan
1 episode
Crispin Glover
1 episode
Stanley Brock
1 episode
Karl Swenson
1 episode
Georganne LaPiere
1 episode
Sandy Kenyon
1 episode
Eileen Dietz
1 episode
Grant Heslov
1 episode
Le Tari
1 episode
Larry Anderson
1 episode
Alberto Isaac
1 episode
Pamela Myers
Mitzi
1 episode
Bill Henderson
Mr. Davis
1 episode
Lloyd Kino
1 episode
Kathy Hilton
1 episode
Morgan Fairchild
Cynthia
1 episode
Charlene Tilton
Jill Higgins
1 episode
David Paymer
1 episode
Karen Arthur
1 episode
Robin Mattson
1 episode
Gary Springer
1 episode
Patti Cohenour
1 episode
Cindy Eilbacher
1 episode
Bryan O'Byrne
Mr. Carlyle
1 episode
Phil Leeds
J. Jackie Silver
1 episode
Dick Yarmy
1 episode
Sam Freed
Millard
1 episode
Ted Gehring
1 episode
Hank Stohl
Announcer
1 episode
Peggy Doyle
Nun
1 episode
Michael Byers
Walter Melman
1 episode
Tammy O'Rourke
Tammy
1 episode
Michael Morgan
Don Mitchell
1 episode
Carol Williams
Meralee
1 episode
Kathy O'Dare
Lois
1 episode
Brian Byers
Biff
1 episode
Betty Kean
Millie
1 episode
Lynn Hallowell
Patti Downes
1 episode
Tony Brafa
Uncle Bobo
1 episode
Mary Treen
Miss Prism
1 episode
Ellen Gerken
Monique
1 episode
Michael Leon
1 episode
Jesse White
Bander
1 episode
Linda Henning
Army Lt. Quinlan
1 episode
Jerii Woods
Kathleen
1 episode
Marta Kober
Jesse Broderick
1 episode
Amy Gibson
Alice
1 episode
Allan Rich
Professor Thomas
1 episode
Dick Balduzzi
Joe
1 episode
Crane Jackson
Hank
1 episode
Joy McConnochie
Martha
1 episode
Michael McManus
Sheriff
1 episode
Michele Tobin
Allison
1 episode
Patricia Carr
Fern Flagg
1 episode
Patricia Lentz
Doctor's Receptionist
1 episode
Laurette Spang
Denise
1 episode
Richard Kuller
Kid
1 episode
Ruth Cox
Thunder McCoy
1 episode
Randy Stumpf
Spider
1 episode
Gloria Hayes
Juanita
1 episode
Henry Charles
Maitre D'
1 episode
Richard Levin
Melvin Scratch
1 episode