Paul Newman as David Alfred Eaton

Joanne Woodward as Mary St. John / Mrs. Alfred Eaton

Ted de Corsia as Mr. Ralph W. Benziger

Ina Balin as Natalie Benziger

Elizabeth Allen as Sage Rimmington

Barbara Eden as Clemmie Shreve

George Grizzard as Alexander 'Lex' Porter

Patrick O'Neal as Dr. Jim Roper

Raymond Greenleaf as Fritz Thornton

Myrna Loy as Martha Eaton

Leon Ames as Samuel Eaton

Malcolm Atterbury as George Fry

Raymond Bailey as Mr. Eugene St.John

Howard Caine as Creighton Duffy

Felix Aylmer as James Duncan MacHardie

Kathryn Givney as Mrs. St. John

Dorothy Adams as Mrs. Benziger

Jimmy Martin as Sandy Duffy

Felippa Rock as Jean Duffy

Regina Carrol as

Alexander Campbell as Partner (uncredited)

Jack Daly as Cab Driver (uncredited)

Robert Shayne as Partner (uncredited)

John Warburton as Partner (uncredited)

Lauren Gilbert as Charles Frolick (uncredited)

Marie Blake as Nellie (uncredited)

Cyril Delevanti as MacHardie's Secretary (uncredited)