The "unaware papa" of the title is played by French comedian Noel-Noel. Ordered by his father to marry a wealthy heiress, our hero changes his mind when he discovers that his former sweetheart has given birth to his child. Noel-Noel sneaks into the maternity hospital and swipes the baby, leading to a merry chase before all is forgiven and Daddy finally marries Mommy. Papa Sans le Savoir was adapted by Yves Mirande from the stage play Little Accident, previously filmed in 1930 with Douglas Fairbanks Jr. The same property would be remade under its original title in 1939, then again as Casanova Brown in 1944.
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