Lew Ayres

Dr. James Kildare

Lionel Barrymore

Dr. Leonard Gillespie

Laraine Day

Nurse Mary Lamont

Nat Pendleton

Joe Wayman

Lana Turner

Rosalie Lewett

Samuel S. Hinds

Dr. Stephen Kildare

Lynne Carver

Alice Raymond

Emma Dunn

Mrs. Martha Kildare

Walter Kingsford

Dr. Walter Carew

Alma Kruger

Molly Byrd

Harlan Briggs

James Galt

Henry Hunter

Harry Galt

Marie Blake

Sally

Phillip Terry

Bates

Roger Converse

Joiner

Don 'Red' Barry

Collins

Reed Hadley

Tom Crandell

Nell Craig

Nurse "Nosey" Parker

George Offerman, Jr.

Nick

Clinton Rosemond

Conover

Johnny Walsh

'Red'

Dorothy Adams

Jenny's Mother (uncredited)

Barbara Bedford

Dr. Carew's Secretary (uncredited)

Margaret Bert

Mrs. Benson - Tommy's Mother (uncredited)

George Chandler

Elevator Operator (uncredited)

Cliff Clark

Detective Flaherty (uncredited)

Elspeth Dudgeon

Old Lady in Hall (uncredited)

George Guhl

Policeman in Nick's Hospital Room (uncredited)

Robert Homans

Hickman - Policeman Bringing Jenny (uncredited)

Horace McMahon

Fog Horn - Taxi Driver (uncredited)

George Noisom

Special Delivery Boy (uncredited)

Frank Orth

Mike Sullivan - Hospital Cafe Owner (uncredited)

George Ovey

Man Telling Hickman to Put His Hat On (uncredited)

Aileen Pringle

Mrs. Thatcher (uncredited)

George H. Reed

Black Man with Stomach Trouble (uncredited)

Matty Roubert

Newsboy (uncredited)

Harry Seymour

Man in Galt's Office (uncredited)

Amzie Strickland

Patient (uncredited)

Ann E. Todd

Jenny (uncredited)

Dorothy Vaughan

Mother of Baby Vaughan (uncredited)

Bobs Watson

Tommy Benson (uncredited)