Frankie Thomas as Nello Daas

O. P. Heggie as Grandfather

Helen Parrish as Maria Cogez

DeWitt Jennings as Carl Cogez

Ann Shoemaker as Ilse Cogez

Christian Rub as Hans

Richard Quine as Pieter Vanderkloot

Frank Reicher as Herr Vanderkloot

Nella Walker as Frau Vanderkloot

Addison Richards as Herden

Sarah Padden as Frau Keller

Harry Beresford as Sacristan

Lightning the German Shepherd as Leopold, 'Leo' the dog

Reginald Barlow as Official with Court Order (uncredited)

Elsa Janssen as The Cogez' Maid (uncredited)

Marcia Mae Jones as Little Girl at Party (uncredited)

Henry Kolker as Monsieur LaTour, Art Critic (uncredited)

Clarence Wilson as Antoine - Official with Court Order (uncredited)