Heartbreaker (French: L'Arnacœur) is a 2010 romantic comedy film directed by Pascal Chaumeil (in his feature directorial debut) and starring Romain Duris, Vanessa Paradis, Julie Ferrier and François Damiens.

Charming and attractive Alex, his sister Mélanie and her husband Marc operate a unique business for concerned third-party clients—breaking up relationships, but only those in which the woman is "unhappy without realising it", often at the request of a family member or close friend.

After the trio conduct an extensive research, it becomes apparent that the couple are truly in love and absolutely perfect for each other, further complicating the task.

Alex initially turns down the job, but massively in debt to a loan shark through his own lavish spending on the business, he is pressured into putting aside his honourable principles to complete the seemingly impossible task with only five days until the wedding.

The next day, as the group leave the hotel, Marc inadvertently drops Juliette's case file in front of her.

At the airport, Mélanie, after carefully observing the events of the past few days, chides Alex for walking away from real love to return to an empty life of fake, short-lived affairs.

The two reunite and kiss after Alex confesses that he hates Roquefort and George Michael and had never seen Dirty Dancing, is broke and sleeps in his office, but he needs to see her every day.

The website's critics consensus reads, "While definitely on the fluffier side of French comedy, Heartbreaker benefits from never taking itself too seriously – and from the performance of the ever-charming Romain Duris.