Spencer Tracy as Pat Jamieson

Katharine Hepburn as Jamie Rowan

Lucille Ball as Kitty Trimble

Keenan Wynn as Quentin Ladd

Carl Esmond as Paul Carrell

Patricia Morison as Edwina Collins

Felix Bressart as Prof. Ginza

Emily Massey as Anna

Gloria Grahame as Flower Vendor

George Chandler as Elevator Operator

Clarence Muse as Train Porter

Eddie Acuff as Cabbie