Lew Ayres
Role: Dr. James Kildare
Lionel Barrymore
Role: Dr. Leonard Gillespie
Laraine Day
Role: Nurse Mary Lamont
Nat Pendleton
Role: Joe Wayman
Lana Turner
Role: Rosalie Lewett
Samuel S. Hinds
Role: Dr. Stephen Kildare
Lynne Carver
Role: Alice Raymond
Emma Dunn
Role: Mrs. Martha Kildare
Walter Kingsford
Role: Dr. Walter Carew
Alma Kruger
Role: Molly Byrd
Harlan Briggs
Role: James Galt
Henry Hunter
Role: Harry Galt
Roger Converse
Role: Joiner
Don 'Red' Barry
Role: Collins
Reed Hadley
Role: Tom Crandell
Nell Craig
Role: Nurse "Nosey" Parker
George Offerman, Jr.
Role: Nick
Clinton Rosemond
Role: Conover
Dorothy Adams
Role: Jenny's Mother (uncredited)
Barbara Bedford
Role: Dr. Carew's Secretary (uncredited)
Margaret Bert
Role: Mrs. Benson - Tommy's Mother (uncredited)
George Chandler
Role: Elevator Operator (uncredited)
Cliff Clark
Role: Detective Flaherty (uncredited)
Elspeth Dudgeon
Role: Old Lady in Hall (uncredited)
George Guhl
Role: Policeman in Nick's Hospital Room (uncredited)
Robert Homans
Role: Hickman - Policeman Bringing Jenny (uncredited)
Horace McMahon
Role: Fog Horn - Taxi Driver (uncredited)
George Noisom
Role: Special Delivery Boy (uncredited)
Frank Orth
Role: Mike Sullivan - Hospital Cafe Owner (uncredited)
George Ovey
Role: Man Telling Hickman to Put His Hat On (uncredited)
Aileen Pringle
Role: Mrs. Thatcher (uncredited)
George H. Reed
Role: Black Man with Stomach Trouble (uncredited)
Matty Roubert
Role: Newsboy (uncredited)
Harry Seymour
Role: Man in Galt's Office (uncredited)
Amzie Strickland
Role: Patient (uncredited)
Ann E. Todd
Role: Jenny (uncredited)
Dorothy Vaughan
Role: Mother of Baby Vaughan (uncredited)
Bobs Watson
Role: Tommy Benson (uncredited)