 Inga TidbladCathérine von Wismar | Cathérine von Wismar |
 Holger LöwenadlerCarl Gustav von Wismar | Carl Gustav von Wismar |
 Lauritz FalkLieutenant Rehusen | Lieutenant Rehusen |
 Erik HellMöllersten | Möllersten |
 Stig JärrelRiddercrantz | Riddercrantz |
 Erik 'Bullen' BerglundTarnow, Russian | Tarnow, Russian |
 Hugo BjörneAdlerhjelm | Adlerhjelm |
 Björn BerglundManderberg | Manderberg |
 Emil Fjellströmskipper Nordström, pilot | skipper Nordström, pilot |
 Frank SundströmGustav III | Gustav III |
 Wiktor Anderssonman at the Blue Gate Inn (uncredited) | man at the Blue Gate Inn (uncredited) |
 Olga AppellöfArchdeacon at Cathérine's musical soiree (uncredited) | Archdeacon at Cathérine's musical soiree (uncredited) |
 Josua Bengtsonconspirator on board the ship (uncredited) | conspirator on board the ship (uncredited) |
 Ann-Margret Bergendahllady in von Wismar's park (uncredited) | lady in von Wismar's park (uncredited) |
 Julie Bernbymaid at the Blue Gate inn throwing out the contents of a chamberpot (uncredited) | maid at the Blue Gate inn throwing out the contents of a chamberpot (uncredited) |
 Ernst Brunmanman at the Blue Gate Inn (uncredited) | man at the Blue Gate Inn (uncredited) |
 Carl-Hugo CalanderLord (uncredited) | Lord (uncredited) |
 Åke ClaessonPolice Chief (uncredited) | Police Chief (uncredited) |
 Nancy DalundeArchdeacon at Cathérine's musical soiree (uncredited) | Archdeacon at Cathérine's musical soiree (uncredited) |
 Agda Helinskips Nordström's old woman (uncredited) | skips Nordström's old woman (uncredited) |
 Tom WalterThe Police Spy (uncredited) | The Police Spy (uncredited) |
 Torsten Lilliecronalackey to von Wismar, guards Rehusen and Riddercrantz (uncredited) | lackey to von Wismar, guards Rehusen and Riddercrantz (uncredited) |
 Sven MagnussonLackey at von Wismar's (uncredited) | Lackey at von Wismar's (uncredited) |
| NNils Nordståhllackey at von Wismar's (uncredited) | lackey at von Wismar's (uncredited) |
 Georg Årlinthe chaplain at Cathérine's music soiree (uncredited) | the chaplain at Cathérine's music soiree (uncredited) |
| AAnna OlinNot listed | Not listed |
 John MelinNot listed | Not listed |
 Manne GrünbergerNot listed | Not listed |
| GGunnar CollinNot listed | Not listed |
 Torsten HillbergNot listed | Not listed |
