| Director | Will Gluck |
|---|---|
| Genre | romantic comedy |
| Runtime | 103 min |
| Country | Australia, United States |
| Budget | $25 million |
| Box office | $220 million |
Bea, a law student, meets bank employee Ben at a coffee shop. The two have an instant connection and spend the day together, ultimately falling asleep together on Ben's couch. Bea leaves without waking him in the morning but quickly reconsiders. When she returns to the apartment, she overhears Ben insulting her while talking to his friend Pete. Unaware that he is covering up that he was deeply hurt by her leaving without a word, Bea departs with the wrong idea.
Six months later, Bea and Ben cross paths again when Bea's sister Halle begins dating Pete's sister Claudia. Bea and Ben are frosty with each other, each blaming the other for their date ending poorly. Halle and Claudia eventually get engaged and plan their wedding in Sydney.
Some time later, Bea, who has recently broken up with her fiancé Jonathan and dropped out of law school, is dismayed to find that she and Ben are on the same flight to Sydney and that both will be staying at the house of Claudia and Pete's parents in the days leading up to the wedding. Their obvious disdain for each other upsets the other members of the wedding party, and the situation is then compounded by the appearances of both Bea's and Ben's exes, Jonathan and Margaret, respectively.
The attendees devise a plan to get Bea and Ben together to ensure the wedding goes smoothly. Bea sees through the scheme, but gets Ben to agree to pretend that they are back together, in order to both make Margaret jealous and stop Bea's parents pushing her to reconcile with Jonathan.
They attempt to sell their relationship with public displays of affection. During a party on a boat, Bea and Ben dance together, and then reenact a scene from Titanic, but it ends with Bea falling into Sydney Harbour. Ben jumps in after her and, while waiting for rescue on a buoy, she tells him that she has withdrawn from law school. They explain to each other what happened the morning after they met, and make a date to sightsee at the Sydney Opera House. After being rescued, the pair return to the house and end up having sex. After, Bea comments offhandedly that her recent actions have all been mistakes, which disappoints Ben. He leaves her while she is sleeping, disheartening Bea.
The morning of the wedding, Bea's parents learn that she has quit law school through Pete whom Ben had told, leaving her feeling betrayed. They tell the others that they were only pretending to be together. After overhearing Halle and Claudia arguing, Ben convinces Bea to pretend to reconcile for the sake of the wedding.
The ceremony goes smoothly, but Bea then sees Margaret kissing Ben, so leaves in tears, saying she needs some time alone. However, Ben rejects Margaret, declaring he no longer has feelings for her. The wedding guests convince Ben to chase after Bea, so, guessing where she has gone, he jumps off a cliff into the Pacific Ocean, asking the wedding party to contact harbor rescue, and then requests the helicopter which picks him up to fly him to the Opera House.
Once there, Ben finds Bea and tells her that he left because he feared their having sex could become another regret for her; Bea tells him that spending the night with him was the first thing she has not regretted in a long time. They reconcile and return to the reception as a couple, where Halle and Claudia reveal that their argument was a ruse to push them together.
During the end credits, Jonathan and Margaret are shown getting together.