Pamela Sue Martin

Abby

Betsy Slade

Muffy

Parker Stevenson

Michael

George O'Hanlon Jr.

Malcolm

Karen Balkin

Laura

Debralee Scott

Ann

Nora Heflin

Emmy

Kathryn Holcomb

Helen

Roderick Cook

Headmaster

Edith Atwater

Mrs. Pendleton

Meg Wyllie

Nurse

Mary Jackson

Miss Moran

Carol Arthur

Gym Teacher

Hope Summers

Biology Teacher

Jerry Hardin

Mr. Keats

Robert Walden

Frank

Luke Andreas

Marge

Darrell Zwerling

Dr. Madden

Lou Frizzell

Dr. Freeman

Michael Gray

Buzzy

Helene Winston

Mrs. H

Helen Baron

Mrs. Reed

Cliff Emmich

Hotel Clerk

Herbert Nelson

Minister

James Brodhead

St. Ambrose Headmaster

Diana Webster

Mrs. Clairmont

Ron Kolman

Jamie Clairmont

Bob Harks

Party Guest (uncredited)