The girls switch places and find out that Diane and Roger would fit together perfectly. So they arrange "chance" meetings with the desired result: they fall in love with each other. After some turbulences, Alyssa (who poses as Amanda) ends up being adopted by the Butkises. She and Diane (while looking for Alyssa) find out the only reason they have adopted many kids was for them to work in their salvage yard.
When Clarice secretly spies on Roger and Diane, she decides to move up the wedding from the next month to the next day. After Amanda, who poses as Alyssa, proves to the family butler Vincenzo (Philip Bosco) who she really is at the church, he summons to have the real Alyssa picked up from the Butkises' salvage yard to stall the wedding. Once she and Diane end up at the church, Roger stops the wedding and tells Clarice that he fell in love with Diane. Furious, she slaps him and prepares to do the same to both Amanda and Alyssa but is stopped by both Vincenzo and Diane. She storms out of the church, embarrassed. Alyssa embarrasses Clarice even more by stepping on her dress, revealing the back of her underpants in front of everybody, including people with cameras. Roger and Diane both find out in the end that it was Amanda and Alyssa that arranged all the meetings between the two of them the entire time.
This film contains examples of:
- Added Alliterative Appeal: Camp Callaway.
- All Girls Like Ponies: Alyssa.
- Alliterative Name:
- The Butkises change the names of all the children they adopt to a name that starts with "B", resulting in this. Alyssa was called Betty during her time there.
- Tellingly, their biological child, Harry, Jr., is the only one without an alliterative name.
- Almost Kiss: Happens a couple of times between Roger and Diane.
- Altar the Speed: Clarice attempts this after noticing the growing bond between Roger and Diane.
- And I'm the Queen of Sheba:
Kid: Every full moon, Old Lady Callaway's ghost crosses the lake and eats one of the campers.
- Early in the film, when the orphans are exploring the camp and see the Callaway mansion across the lake.
Amanda: Yeah, and Santa Claus lives with the Tooth Fairy in Queens.
Alyssa: My name is Alyssa Callaway!
- Also in the climax, when Alyssa (posing as Amanda) attempts to reveal her real identity after being adopted by the Butkises.
Harry Butkis: Yeah, right, and I'm Princess Di.
- Big Fancy House: The Callaway Mansion. The orphans think it's haunted.
- Big "OMG!": After Clarice sees that Amanda spit gum into her hair.
- Bitch in Sheep's Clothing:
- Also the Butkises. They're not nearly the warm and friendly adoptive parents they may appear to at first sight.
- Big Damn Heroes: The people from the Callaway estate who show up in a helicopter to rescue Alyssa, who had been posing as Amanda, from the Butkises' salvage yard. They then proceed to land the helicopter in the middle of Central Park.
- Big Damn Kiss: Roger and Diane at the end. Finally.
- Chekhov's Skill: Alyssa's talent at miming passing out first gets used when she finds out that Clarice and Roger are getting married. It gets used again during a game of Charades.
- Department of Child Disservices: Diane's employers won't let her adopt Amanda because she doesn't make enough money, yet are perfectly willing to foist Amanda on the Butkises - a family that turns out to have been adopting kids by the half dozen to force them to work in their junkyard. The fact that a neighbor brings this last point up in casual conversation makes it even worse - the Butkises aren't even keeping it a secret.Diane (on the phone to DSS): Let me just run this by you one more time, okay? Please, just hear me out, one more time. Okay. I know I don't make that much money, and I know that I'm a little bit single, but I want to adopt Amanda. No, I - Are you laughing at me? (disbelieving) He's laughing at me! You... YOU STUPID JERK! (slams down phone)
- Family Theme Naming: The adopted Butkises all have B names.
- Fainting: Alyssa's (fake) reaction when her father reveals that he intends to marry Clarice. According to Roger, she does this often when she is displeased. She later (pretending to be Amanda) does it when she didn't know what to do during a game of charades and it ended up helping them win the game.
- Food Fight: One of the girls starts one in the camp mess hall before their cover gets blown.
- Gold Digger: Take a wild guess...
- Hero Stole My Bike: In the climax, Diane and Alyssa steal a Central Park horse-drawn buggy in order to get to the chapel in time to stop the wedding.
- How Many Fingers?: Diane to Roger after he falls off of his horse.
- Hypocrite: Roger hates cell phones, but he made his fortune by investing in the cell phone industry.
- I Ate WHAT?!: Amanda with escargot at a dinner party.Amanda (to herself): All this money, and these people eat slugs?
- Identical Stranger: Alyssa and Amanda.
- "I Know What We Can Do" Cut: The girls' decision to get Roger and Diane to meet while horseback riding.
- Kids Play Matchmaker: The premise involves two girls trying to get their parental figures to meet.
- Love at First Sight: It only took Roger three interactions to fall in love with Diane.
- Mama Bear: Diane, particularly near the end of the film.
- Match Cut: When Amanda gets settled in at camp, she places her hat on her bed. The scene cuts to Alyssa doing the same in her room.
- Naked Freak-Out: Happens to Clarice after Alyssa steps on her wedding dress, ripping off the entire skirt revealing her white panties.
- Off to Boarding School: Clarice plans to send Alyssa to a boarding school in Tibet.
- Overcrank: To avoid being discovered, Alyssa trips Frankie, causing him to cover Roger in macaroni and cheese. It triggers a massive Food Fight.
- Papa Wolf: Vincenzo, like Diane, gets a moment of this near the end of the film.
- Parent with New Paramour: She's terrible.
- Prince and Pauper: Rich girl and orphan girl take advantage of being identical strangers to live each other's lives.
- Race for Your Love / Speak Now or Forever Hold Your Peace / Wedding Smashers: The climax.
- Rescue Romance: Roger saves Diane from her horse, and Diane gives Roger first aid when he falls off of his horse.
- Self-Made Man: Roger Calloway. He made his money "the old-fashioned way - pure dumb luck"
- Servile Snarker: Vincenzo.
- Society Marches On: Central Park's horse-drawn carriages are at the center of an animal rights debate in Real Life. Fortunately, the horse in the climax gets to retire.
- Spoiled Sweet: Alyssa is the daughter of a wealthy man and seems to get whatever she wants. However, she is very polite and kind to others.
- Tomboy and Girly Girl: Amanda loves playing baseball, has no qualms about getting dirty and wears primarily shorts and t-shirts, with the occasional baseball cap. Alyssa wears frilly dresses, performs in piano recitals and is much more soft spoken and polite.
- Tomboyish Baseball Cap: Amanda occasionally wears one. Alyssa later wears one when posing as Amanda.
- Twin Switch: Naturally, as it's Olsen Twins Movie; however, here it forms the very essence of the plot.
- Uptown Girl: Diane believed rich guys like Roger would never marry people like her.
- What Does He See In Her: Clarice is a Child Hater sports hater bitch. Yet Roger is marrying her.
- Witch with a Capital B: Clarice.
- Wicked Stepmother: Clarice is aiming to become one to Alyssa.
- Would Hit a Girl: Vincenzo doesn't actually go through with it, but he's not shy about making the threat."Lady, If you touch that child, I will pop you one so help me God."
- Would Hurt a Child: When Clarice realizes she's lost, she is only too ready to hit the girls. Only timely interference from Vincenzo and Diane keep her from doing so.