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Karel Roden as Slender Man |
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Aaron Stanford as Anthony Tregoni |
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Joaquim de Almeida as Mangini |
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Ben Gazzara as Vatican's Banker |
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Suzanne Bertish as Charlotte |
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Valeria Solarino as Bianca |
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Nicola Di Pinto as Marcello |
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Cameron Watson as Bartender |
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Mario Monaci Toschi as Sant'Angelo's Mayor |
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Pino Colizzi as Giacomo |
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Francesco Guzzo as Porteglia |
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Tiberio Murgia as Chess player |
| Directing | Maxime Alexandre | Director |
| Writing | Maxime Alexandre | Writer |
| Writing | Philippa Goslett | Writer |
| Production | Gauthier Broze | Producer |
| Art | Cristina Pietropaolo | Production Design |
| Camera | Maxime Alexandre | Director of Photography |
| Costume & Make-Up | Peggy Bernaerts | Key Makeup Artist |
| Production | Cosimo Milone | Casting |
| Costume & Make-Up | Jean Marc Mirete | Costume Design |
| Production | Inigo Lezzi | Executive Producer |
| Editing | Yoohan Leyssens | Editor |
| Production | Marie Christine Vanden Eede | Producer |
| Production | Benedikt Van der Vorst | Producer |
| Production | Teresa Razzauti | Casting |
| Writing | Marie Christine Vanden Eede | Writer |
| Production | Marie Christine Vanden Eede | Executive Producer |
| Production | Inigo Lezzi | Producer |
| Sound | Claude Samard | Original Music Composer |
| Art | Gaia Zambelli | Set Decoration |
