• Trivia

• Meredith is heard talking on the cell phone to a "Reverend Mosby," a reference to a character in the original The Parent Trap (1961).
• Lindsay Lohan can be heard singing "Let's Get Together" as she walks into the elevator at the Stafford Hotel. This song is from the 1961 original. Similarly, the first few notes of "Let's Get Together" are played as the closing notes of music at the tail of the end credits.
• Lindsay Lohan's first movie.
• Actress Joanna Barnes played the "wicked girlfriend" in The Parent Trap (1961) and plays the mother of the wicked girlfriend in this version. Both characters are named Vicky.
• The twins in this version are named after director Nancy Meyers' and producer Charles Shyer's daughters Annie Meyers-Shyer and Hallie Meyers-Shyer, both of whom have small parts in the movie. Hallie is playing a girl at camp at the beginning who asks where the Navajo bunk is, and Annie is playing the towel girl at the hotel, who brings Elizabeth the first aid kit.
• Marva Kulp Sr. and Jr., the camp counselors, are named in tribute to Nancy Kulp, who played the younger of the camp counselors in the 1961 original.
• After Hallie arrives in London, her mother takes her to a photo shoot. Above this, we hear a cover version of "Here Comes The Sun" by The Beatles, one of the songs on "Abbey Road". As we watch Hallie and her mother on her way, they cross the same street the same way as The Beatles did for the cover photo of "Abbey Road". Even the cars on the side are the same.
• The lost boy who shows up at the girls camp is played by Michael Lohan, Lindsay Lohan's real-life brother. Lindsay's siblings regularly appear as extras in her movies.
• When Hallie arrives in London and meets Martin at the airport, at the point where the two begin their greeting you can see Lindsay Lohan's mother holding her brother Dakota and beside her is Lindsay's other brother Michael and sister Aliana.
• Writer and director Nancy Meyers handpicked Lindsay Lohan to play the dual role of the twins in the film, and phoned the Lohan household herself to inform the actress that she had landed the part.
• Michelle Trachtenberg was considered for the role(s) of the twins. Coincidentally, the actress's birthday falls on 11th October, the same day as Hallie and Annie's in the film.
• The man who weds the parents at the beginning is played by Director of Photography, Dean Cundey.
• The scene where Annie and Hallie are lying in bed and the camera pans from the moon, to the parents' picture, to the twins took six hours to get it right. Lindsay Lohan' had to change from Annie to Hallie, and back all the time.
• From the opening of the film we find out that the parents were married on 8 January 1986. Nicholas Parker was 24 and Elizabeth James was 23. Elizabeth's occupation is listed as artist, while Nick's is listed as Viticulturist.
• Annie makes a call to 'Mildred Plotka', a reference to the 1934 movie.
• We learn that Camp Walden is in Maine from seeing the State Flag from Maine as it is going up in the morning and also when it comes down in the rain storm.
• The name of the hotel, The Stafford, is a reference to the name of a boy in The Parent Trap (1961). He is the boy Hayley Mill's character, Susan, is talking to at the camp dance.