Cheaper by the Dozen 2 is a film produced by 20th Century Fox and released in 2005. It is the sequel to the family comedy film Cheaper by the Dozen (2003). Shawn Levy, the director of the first film, did not return as director for this sequel, which was instead directed by Adam Shankman (The Pacifier). Levy was a producer of the film and made an appearance as a hospital intern in the movie. Steve Martin, Bonnie Hunt, Hilary Duff, Piper Perabo, and Tom Welling reprise their roles as members of the twelve-child Baker family. Eugene Levy co-stars as the patriarch of a rival family of 8 children. Carmen Electra portrays Levy's trophy wife.
At the party, the family stands out, as they were not told that the party was a smart occasion and come casually dressed, arriving to find everyone else smartly dressed. Meanwhile, the Bakers run into the their rivals from the first movie, the Murtaughs. The kids make friends. Mark and Jake bring fireworks to the clambake. Mark puts down the book bag down sending the fireworks shooting everywhere. The next day, Tom wakes everybody up for breakfast and he thinks that having a camp out will bring the family together, so they all put up tents and sit around the campfire. They have a singing match with the Murtaughs around the lake. Then Jimmy comes and invites the Baker family over to their home. When they arrive, Tom is furious by how boastful Jimmy is and asks Sarah to play a trick on Jimmy in return for not being punished. She places meat in Jimmy's seat and releases their dog (who loves meat a lot, as seen in the previous movie). Things don't go exactly as planned, as Tom and Jimmy trade places to sit next to their respective wives. However, Sarah succeeds in destroying Jimmy's priceless crockery, which he claims he got from the King of Thailand. However, Jimmy sarcastically assures the family it's no big deal.
Eliot Murtaugh and Sarah are going knee boarding. Their father goes with wearing a wetsuit and elects to go first. However, he falls over, but does not let go and gets dragged a long way across the lake before being discovered by Sarah, who is angered that he has embarrassed her. Meanwhile, Charlie, and Anne talk about their future. Anne wants to leave Harvard and start painting and Charlie says that he wants to move up here and open a garage. Jimmy challenges Tom to a Labor day Competition, to which Tom agrees, despite promising not to. Meanwhile Sarah is caught shoplifting some makeup from the gift shop. Through talks with Kate, she admits she doesn't want to be embarrassed being caught buying makeup, so Kate explains all girls purchase makeup eventually and asks Sarah to promise to just buy the makeup instead of shoplifting it. Tom makes a practice schedule for the competition and tells the kids they can no longer associate with the Murtaugh family. Defying this, Sarah and Eliot form a bond. Eliot asks Sarah to go on a date with him and kisses her on the cheek. Tom quickly agrees, but Sarah hogs the bathroom to prepare for the date. Lorraine quickly arrives and helps Sarah put on her makeup. Sarah then leaves for her date. However, Tom goes to the movie they are watching to spy on them and unfortunately gets into a fight with Jimmy (who is also spying on Eliot) about "the move" (Eliot puts his arm around Sarah in the middle of the movie) and as a result, makes himself known to Sarah, so she and Eliot don't even get a chance to kiss. Sarah storms home afterwards in a fit of anger and declares she is not attending the Labor day competition the next day. The entire family, especially Lorraine are shocked at how low their father would sink in prying deep into their private lives. They also announce they will take Sarah's side and not join the Labor Day competition.
The next day is the competition but the only people who are going to help Tom are his younger twins. Kate stays with the rest of the family. In the rat’s hole, they find the old family flag. They then race to Tom's aid and join him in the nick of time. The competition goes to a tie-break canoe race but Nora goes into labor partway through the race. The Murtaughs try to stop and help, but Jimmy, sensing the opportunity to defeat Tom once and for all, refuses. However his eight kids, for once, defy him and get out of the boat to help the Bakers. Sarina announces to him that his kids like the Bakers, that his rivalry with Tom was before any of them, including herself was born and that he should listen to them, unless he wants to start looking for a new wife. He reluctantly agrees.
Tom waits in the waiting room with his kids and the Murtaugh family. Anne tells her dad that she is leaving Harvard. Jimmy is objective at first, but Sarina reminds him to listen to their kids. Charlie tells Tom that he is opening a garage here. Both Jimmy and Tom accept these facts when they can go see Nora’s baby. Nora says they are going to name the baby Tom because he has taught them so much that there is no way to be a perfect parent, but a million ways to be a good one. Tom sheds a tear as he holds his new grandson. The next day, Bud and Nora buy the house on Lake Winnetka. That night Tom and Kate dance together on the dock and it starts to float away.