| Original title | Pierre et Paul | 
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| Danish title | En letsindig optimist | 
| International titles | Pierre and Paul | 
| Leikstjórn | René Allio | 
| Screenplay | René Allio | 
| Based on | Fortælling af René Allio & Serge Ganz. | 
| Director of Photography | Georges Leclerc | 
| Editor | Chantal Delattre | 
| Composer | Jacques Dutronc | 
| Appearance | Pierre Mondy, Bulle Ogier, Madeleine Barbulée | 
| Land | Frankrig | 
| Domestic distribution | Gloria-Film | 
| Technical info | 35 mm, Widescreen, Eastmancolor, Tone | 
| Danish theatrical release | 12.12.1973 | 
| Cinemas | Alexandra | 
| Kommentar | Farvesystem: Eastmancolor + s/hv. | 
      Companies | 
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| Production company | Productions de la Guéville, Madeleine Films, Films de la Colombe, Berned Films, Polsim Prod. | 
| Domestic distribution | Gloria-Film | 
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      Instruktion | 
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| Instruktion | René Allio | 
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      Manus | 
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| Manus | René Allio | 
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      Produktion | 
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| Produktion | Léon Carré | 
| Produktion | Yves Robert | 
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      Foto | 
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| Foto | Georges Leclerc | 
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      Klip | 
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| Klip | Chantal Delattre | 
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      Musik | 
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| Musik | Jacques Dutronc | 
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      Medvirkende | 
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| Medvirkende | Pierre Mondy | 
| Medvirkende | Bulle Ogier | 
| Medvirkende | Madeleine Barbulée | 
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