Bachelor Flat

Professor Bruce Patterson is constantly having to fight off the advances of his young female students and is engaged to Helen Bushmill. While Helen goes on vacation, Bruce decides to stay at her apartment but is surprised by the arrival of Libby, Helen's 17-year-old daughter. Having never been told by Helen of this daughter, Bruce assumes she's another student. During her stay, Libby is noticed by an amorous neighbor, Mike.

Tuesday Weld

Libby Bushmill / Libby Smith

Richard Beymer

Mike Pulaski

Terry-Thomas

Professor Bruce Patterson

Celeste Holm

Helen Bushmill

Francesca Bellini

Gladys Schmidlapp

Howard McNear

Dr. Dylan Bowman

Ann Del Guercio

Liz Turner

Roxanne Arlen

Mrs. Roberts

Alice Reinheart

Mrs. Bowman

Jessica Dachshund

Jessica

Stephen Bekassy

Paul

Danielle Aubry

French Stewardess

Joe Brooks

Driver

George Bruggeman

Paul Revere

Jerry Fujikawa

Frank, Gardener

Margo Moore

Mabel Smith

Stephen Chase

District Attorney

Dick Whittinghill

Radio DJ (Voice)