Carol Lynley
— Janet Willard
Brandon De Wilde
— Arthur Bartley
Macdonald Carey
— Maj. Malcolm Bartley, Ret.
Marsha Hunt
— Jessie Bartley
Warren Berlinger
— Ernie
Vaughn Taylor
— Professor Willard
Nina Shipman
— Lillian Bartley
Buck Class
— Axel Sorenson
Roberta Shore
— Cherie
William Schallert
— George - Bank Vice President (uncredited)
Jenny Maxwell
— Marion (uncredited)
Jesslyn Fax
— Aunt Margaret
Sam Buffington
— Abortionist
Billie Bird
— Woman (uncredited)
Bess Flowers
— Chaperon at Dance (uncredited)