Originally entitled Plan B, The Back-Up Plan is a comedy-romantic movie that casts Jennifer Lopez and Alex O'Loughlin. The film grossed 90 million with a production budget of $35 million. The Back-Up Plan runs for a total of 104 minutes. Jennifer Lopez plays as Zoe, a woman who has surrendered with the idea of the perfect man and decides to become a single mom by partaking in an artificial insemination procedure. On the same day she got the procedure done, she bumps into Stan, played by Alex O'Loughlin, when they both try to get into the same taxi cab. After debating for quite some time, they both get off the taxi, insisting that the other person rides the taxi yet both end up stuck.
After the awkward first encounter, they bump into each other again when Zoe shops at a farmers market where Stan works and another time in the pet shop. Running into each other multiple times, Stan decides to ask Zoe out on a non-obligation date. Zoe is reluctant but is eventually persuaded by Stan. During the date, she is still uncertain if she is positive for pregnancy and if she should tell her date about it. At the same night when Stan takes her for a romantic dinner, Zoe decides to take a pregnancy test.
As the date progresses, things begin to fall out of place when Stan spills the wine and a fire breaks out. As the date was ending, Stan asks Zoe to visit his farm over the weekend. Zoe then finds out that she is indeed positive and is carrying a child. She goes to visit the farm determined to confess to Stan that she is indeed pregnant. But instead of a confession, they have sex in the farm. Midway their sexual intercourse, Zoe tells her the truth. At first, Stan is angry and confused. Zoe leaves the next morning, but is attempted to stop by Stan, apologizing for the way he acted the night before.
Stan and Zoe try to become a couple and help each other while Zoe is undergoing pregnancy and Stan is studying as a lawyer. After running into Stan's classmate at the farmers market, Stan makes a statement that the babies aren't his, which leads Zoe to believe that Stan is not prepared to be a father.