• 
  John Phillip Law

  rol minor
• 
  Louis Calhern

  Oliver Wendell Holmes
• 
  Ann Harding

  Fanny Bowditch Holmes
• 
  Larry Steers

  Court Guest
• 
  Hayden Rorke

  Graham, reporter for Boston Transcript
• 
  Richard Anderson

  Reynolds, Secretary
• 
  Gayne Whitman

  Senator
• 
  Selmer Jackson

  Mr. Amboy (lawyer)

• 
  Edith Evanson

  Annie Gough, Holmes' Housekeeper
• 
  Walter Merrill

  Reporter
• 
  Holmes Herbert

  Justice McKenna
• 
  Philip Ober

  Owen Wister/Narrator
• 
  David Alpert

  Secretary
• 
  William Johnstone

  Avocat
• 
  Harlan Warde

  Norton, Secretary

• 
  Hugh Sanders

  Parker, Secretary
• 
  Fred Gilman

  Şofer
• 
  Dan Tobin

  Dixon (real estate broker)
• 
  Stuart Holmes

  Justice
• 
  Eduard Franz

  Judge Louis Brandeis
• 
  Ian Wolfe

  Adams
• 
  Herbert Anderson

  Baxter, Secretary (as Guy Anderson)
• 
  Jimmy Lydon

  Clinton, Secretary (as James Lydon)