Louis Calhern
— Oliver Wendell Holmes
Ann Harding
— Fanny Bowditch Holmes
Eduard Franz
— Louis Brandeis
Philip Ober
— Owen Wister / Narrator (voice)
Ian Wolfe
— Adams
Edith Evanson
— Annie Gough
Herbert Anderson
— Baxter
Richard Anderson
— Reynolds
Jimmy Lydon
— Clinton
David Alpert
— Secretary (uncredited)
Arthur Anderson
— Court Clerk (uncredited)
Robert Board
— Secretary (uncredited)
Marshall Bradford
— Headwaiter (uncredited)
Morgan Brown
— Justice (uncredited)
Wheaton Chambers
— Senator (uncredited)
Lyle Clark
— Secretary (uncredited)
Dick Cogan
— Reporter (uncredited)