When silly inventor Svensson gets mistaken for Swedish/American aviator Smith, he is accidentally enlisted in the military and drawn into unexpected romantic affairs.
as Fridolf Ambrosius Svensson
as Mary Lantz
as Sergeant major Göransson
as Mary Björklund
as Colonel Sixten Björklund, Mary's father
as Harald Smith, Swedish-American, journalist and civilian pilot, Mary's fiancé
as Lieutenant
