 Lew AyresDr. James Kildare | Dr. James Kildare |
 Lionel BarrymoreDr. Leonard Gillespie | Dr. Leonard Gillespie |
 Laraine DayNurse Mary Lamont | Nurse Mary Lamont |
 Nat PendletonJoe Wayman | Joe Wayman |
 Lana TurnerRosalie Lewett | Rosalie Lewett |
 Samuel S. HindsDr. Stephen Kildare | Dr. Stephen Kildare |
 Lynne CarverAlice Raymond | Alice Raymond |
 Emma DunnMrs. Martha Kildare | Mrs. Martha Kildare |
 Walter KingsfordDr. Walter Carew | Dr. Walter Carew |
 Alma KrugerMolly Byrd | Molly Byrd |
 Harlan BriggsJames Galt | James Galt |
 Henry HunterHarry Galt | Harry Galt |
 Marie BlakeSally | Sally |
 Phillip TerryBates | Bates |
 Roger ConverseJoiner | Joiner |
 Don 'Red' BarryCollins | Collins |
 Reed HadleyTom Crandell | Tom Crandell |
 Nell CraigNurse "Nosey" Parker | Nurse "Nosey" Parker |
 George Offerman, Jr.Nick | Nick |
 Clinton RosemondConover | Conover |
| JJohnny Walsh'Red' | 'Red' |
 Dorothy AdamsJenny's Mother (uncredited) | Jenny's Mother (uncredited) |
 Barbara BedfordDr. Carew's Secretary (uncredited) | Dr. Carew's Secretary (uncredited) |
| MMargaret BertMrs. Benson - Tommy's Mother (uncredited) | Mrs. Benson - Tommy's Mother (uncredited) |
 George ChandlerElevator Operator (uncredited) | Elevator Operator (uncredited) |
 Cliff ClarkDetective Flaherty (uncredited) | Detective Flaherty (uncredited) |
 Elspeth DudgeonOld Lady in Hall (uncredited) | Old Lady in Hall (uncredited) |
 George GuhlPoliceman in Nick's Hospital Room (uncredited) | Policeman in Nick's Hospital Room (uncredited) |
 Robert HomansHickman - Policeman Bringing Jenny (uncredited) | Hickman - Policeman Bringing Jenny (uncredited) |
 Horace McMahonFog Horn - Taxi Driver (uncredited) | Fog Horn - Taxi Driver (uncredited) |
