Robert Cummings as Professor Sutwell

Dorothy Malone as Marianne

Frankie Avalon as Frankie

Annette Funicello as Dolores

Morey Amsterdam as Cappy

Harvey Lembeck as Eric Von Zipper

Eva Six as Ava

John Ashley as Ken

Jody McCrea as Deadhead

Dick Dale as Himself

Andy Romano as J.D.

Jerry Brutsche as The Ratz

Bob Harvey as The Ratz

John Macchia as The Ratz

Alberta Nelson as The Mice

Linda Rogers as The Mice

David Landfield as Ed

Valora Noland as Rhonda

Bob Payne as Tom

Pam Colbert as Surfer

Delores Wells as Sue

Johnny Fain as Surfer

Meredith MacRae as Beach Girl

John Beach as Beach Boy

Lorrie Summers as Beach Girl

Roger Bacon as Tour Guide

Luree Holmes as Beach Girl

Michael Nader as Beach Boy

Laura Nicholson as Beach Girl

Mickey Dora as Beach Boy

Donna Russell as Surfer

Ed Garner as Surfer

Candy Johnson as Perpetual Motion Dancer

Vincent Price as Big Daddy

Duane Ament as Big Boy (uncredited)

Marlo Baers as Beach Girl (uncredited)

Brent Battin as Beach Boy (uncredited)

Roger Christian as Beach Boy (uncredited)

Ashlyn Martin as Surfer (uncredited)

Bill Parker as Beach Boy (uncredited)

Bill Slosky as Beach Boy (uncredited)

Gary Usher as Beach Boy (uncredited)

Yvette Vickers as Blonde Yoga Girl (uncredited)

Susan Yardley as Surfer (uncredited)