Dwayne Hickman
Dobie Gillis (36 eps)
Bob Denver
Maynard G. Krebs (36 eps)
Frank Faylen
Herbert T. Gillis (36 eps)
Florida Friebus
Winifred Gillis (36 eps)
Sheila James Kuehl
Zelda Gilroy (36 eps)
Marvin Kaplan
Mr. Monty W. Milfloss (1 eps)
Bea Benaderet
Telephone Operator (voice) (1 eps)
Ralph Sanford
Fred (uncredited) (1 eps)
Yvonne Craig
Hazel Grimes (1 eps)