| 21 Ways to Ruin a Marriage | |
| Native Name: | |
| Director: | Johanna Vuoksenmaa |
| Producer: | Riina Hyytiä |
| Music: | Kerkko Koskinen |
| Cinematography: | Jan Nyman |
| Editing: | Antti Reikko |
| Studio: | Dionysos Films |
| Distributor: | Oy Nordisk Film Ab |
| Country: | Finland |
| Language: | Finnish |
21 Ways to Ruin a Marriage (Finnish: 21 tapaa pilata avioliitto) is a 2013 Finnish film written and directed by Johanna Vuoksenmaa.[1] It was the highest grossing locally produced movie of the year in Finland.[2]