Tommy Kirk as Merlin Jones

Annette Funicello as Jennifer

Leon Ames as Judge Holmsby

Arthur O'Connell as Darius Green III

Frank Faylen as Mr. Dearborne

Leon Tyler as Leon

Brian Wilson as Self - The Beach Boys

Carl Wilson as Self - The Beach Boys

Dennis Wilson as Self - The Beach Boys

Al Jardine as Self - The Beach Boys

Mike Love as Self - The Beach Boys

Norman Grabowski as Norman

Cheryl Miller as Lisa

Connie Gilchrist as Mrs. Gossett

Alan Hewitt as Professor Shattuck

Gage Clarke as College President

Mark Goddard as Haywood

Harry Holcombe as Regent

Alexander Lockwood as Regent

Harry Antrim as Regent