Lew Ayres

Dr. James Kildare

Lionel Barrymore

Dr. Leonard Gillespie

Laraine Day

Nurse Mary Lamont

Samuel S. Hinds

Dr. Stephen Kildare

Gene Lockhart

George Winslow

John Shelton

Dr. Davidson

Nat Pendleton

Joe Wayman

Emma Dunn

Mrs. Martha Kildare

Alma Kruger

Molly Byrd

Walter Kingsford

Dr. Walter Carew

Nell Craig

Nurse Parker

Henry Wadsworth

Collins

Tom Collins

Joiner

George H. Reed

Conover

Donald Briggs

Mr. Brownlee

Leona Maricle

Mrs. Brownlee

Archie Twitchell

Bates

Marie Blake

Sally

Charles Trowbridge

Atkinson

Arthur O'Connell

Intern (uncredited)

Eddie Acuff

Clifford Genet - an Orderly (uncredited)

Erville Alderson

Boylston - City Council Member (uncredited)

Arthur Aylesworth

Mr. Cobb - a Farmer (uncredited)

Barbara Bedford

Carew's Secretary (uncredited)

George Chandler

Parkersville Counterman (uncredited)

Jane Drummond

Nurse Probationer (uncredited)

Ralph Dunn

Motorcycle Cop (uncredited)

Claire McDowell

Nurse for Mr. Winslow (uncredited)

Horace McMahon

Foghorn Murphy (uncredited)

Frank Orth

Mike Ryan (uncredited)

Milton Parsons

Parkersville Crazy Man (uncredited)

Ferris Taylor

Dr. Coldridge (uncredited)