Heartbreaker (2010)

Description[from Freebase]

Heartbreaker (French: L'arnacœur) is a 2010 French romantic comedy film starring Romain Duris, Vanessa Paradis, Julie Ferrier and Andrew Lincoln. The bulk of the story takes place in Monaco. The plot is centered around Alex (Romain Duris), his sister (Julie Ferrier) and her husband (François Damiens), who operate a business designed to break up relationships, but only where the woman is "not knowingly unhappy." The trio concoct elaborate, custom ruses to deceive the women. After each woman has fallen for his act, Alex tells her she has made him come alive again, but that it is too late for him. The women presumably each leave their relationships to seek men who makes them feel as Alex has. They are hired by a wealthy man (Jacques Frantz), who is a florist and possible gangster, to prevent the wedding of his daughter Juliette (Vanessa Paradis) to Englishman Jonathan (Andrew Lincoln). The problem is that they only have 10 days to do so before the wedding. The task is further complicated because the couple appear to be in love and absolutely perfect for each other. They also could not find the usual "flaws" in the couple that they are used to looking for in couples to break them up.

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