21 Ways to Ruin a Marriage (2013) is a Comedy, Romance film that follows the film follows Sanna, who sets out to document the countless ways there are to ruin a marriage for her doctoral thesis. 21 Ways to Ruin a Marriage is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 5.8 out of 10 from 34 votes. Fans of comedy movies may also want to explore similar titles below.