| Director | Gary Winick |
|---|---|
| Genre | female buddy film, romantic comedy |
| Runtime | 90 min |
| Country | United States |
| Budget | $30 million |
| Box office | $115.8 million |
Emma Allan and Olivia "Liv" Lerner are longtime best friends. Ever since they witnessed a wedding 20 years earlier at the Plaza Hotel, they have dreamed of holding their own June weddings there. Liv's parents died when she was a child. Liv grows up to be a successful attorney at Ropes & Gray. She is used to getting her way and constantly tries to be perfect. Her boyfriend Daniel Williams is a hedge fund manager. Emma becomes a middle school teacher who takes care of everyone, but sometimes forgets to take care of herself. Her boyfriend of ten years, Fletcher Flemson, is controlling, and takes advantage of her compliant, meek nature.
One day, Emma and Liv find a Tiffany box concealed in Liv's closet. Both are excited, believing it means Daniel is about to propose. However, that night, it is Fletcher who proposes. Liv confronts Daniel at his office the next morning. It turns out he had planned to propose that night, but he then asks her on the spot. Emma and Liv schedule a meeting with Manhattan's most famous wedding planner, Marion St. Claire, who tells them there are only three spots open at The Plaza in June: two at the same time on June 6 and one on June 27. They each choose a different date so their big days will not clash. However, both are scheduled for June 6 by mistake.
They ask the third bride, Stacey, to switch her date with Emma, but she refuses. Liv fights with Stacey as she is registering for gifts, causing Liv and Emma to be escorted out of the store. After a week of passive-aggressive hostility, it is clear that neither will compromise. The women declare war after a slight misunderstanding that Liv already announced her wedding date. In retaliation, the outraged Emma sets her date as well, which Liv discovers at their shared bridal shower. They threaten and insult each other in front of their friends, who decide not to take sides.
Both attempt to sabotage the other's wedding. Liv changes Emma's dance instructor; Emma secretly sends Liv candy so her dress will not fit; Liv makes Emma's spray tan bright orange; Emma changes Liv's hair dye to blue; Liv registers Emma on Babies "R" Us and spreads rumors that she is pregnant; Emma shows up to Liv's invite-only bachelorette party and outdances her. Emma and Fletcher argue over her behavior. Fletcher cannot accept her newfound outspokenness and self-confidence. In contrast, Liv has learned to be more sensitive and expressive and has grown closer to Daniel. However, her stress about the wedding causes her demotion at work.
At the Plaza shortly before their ceremonies, Emma's father gives Liv his blessing, causing her to regret setting up a wild spring break DVD to play at Emma's ceremony. She sends her assistant Kevin to replace the DVD with the original one, filled with childhood memories. Believing it is a prank, he does not do it. Before the brides enter their respective venues, they share a brief moment of reconciliation from afar, smiling at each other. Liv's smile is confident, but Emma's is tinged with tears, suggesting she is having second thoughts about her fiancé.
Emma begins walking down the aisle, but stops when she sees the spring break DVD playing. Infuriated, she tackles Liv at her wedding on the other side. While wrestling in their dresses on the floor, they shock the guests. Emma tells Fletcher she is not the same person he fell in love with 10 years earlier, and they subsequently call off their wedding. Liv's wedding resumes after they reconcile. Emma, now Liv's maid of honor, later dances with Liv's brother Nate, a well-known magazine journalist.
A year later, Liv and Emma meet up for drinks, where it is revealed that Emma married Nate. Liv proposes a toast to marriage, but Emma says she is not drinking. When Liv says she is not either, they realize they are both pregnant and their due dates are the same: March 3. The best friends squeal with excitement and hug happily.