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13 Going on 30 (2004) Poster

Trivia

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Jennifer Garner improvised a lot of Jenna's child-like observations, e.g. when Alex wants to play (sex) games with Jenna, she suggests Battleship.
Jennifer Garner was very happy with the studio's choice of Christa B. Allen to play the young Jenna. She felt Allen really embodied her at that age, and later got the producers of Ghosts of Girlfriends Past (2009) to cast Allen in a similar role.
As Jenna softens, the production team adjusted her wardrobe accordingly, e.g. wearing warmer colours. And as Lucy becomes ruthless, her fashion sense goes the same way.
When 13 year old Jenna goes into the closet for "7 minutes of heaven", you can see actual photos of Jennifer Garner as a kid on the back of the door.
Jennifer Garner, Mark Ruffalo and Judy Greer were the studio's first choices to play Jenna, Matt and Lucy.
Mark Ruffalo's first scene was the Michael Jackson: Thriller (1983) sequence. He was terrified of doing it but Jennifer Garner's enthusiasm was 'very infectious'. Andy Serkis had to rehearse the scene separately from everybody else because he was in London at the time.
In Jenna's room on the day of her 13th birthday party, there is a framed picture of Madonna on her vanity table, leaned on the mirror. When she is 30, she comes across the same photograph, but it is signed.
If the cast weren't sure if things were funny enough, they would ask Judy Greer because they all felt she was the funniest person on the set.
The Poise article that Jenna is reading at 13 ("Thirty, Flirty & Thriving"), features the apartment that she later lives in at 30.
The scene between Jenna and Becky in the elevator was shot in one take.
In Australia, the title was changed to "Suddenly 30" because distributors thought audiences would misunderstand the original title.
The producers realized how funny Jennifer Garner was during her acceptance speech for winning an award in The 59th Annual Golden Globe Awards (2002) as Sydney Bristow in Alias (2001). They made a point of casting her for the role of Jenna.
Some scenes between Jennifer Garner and Mark Ruffalo were improvised.
Rick Springfield attended the premiere, his way of thanking the producers for playing one of his songs in the movie.
Jennifer Lopez is featured on both the Sparkle and Poise magazine covers. Ironically, during the filming of this movie, Jennifer Lopez was in a serious relationship with Ben Affleck - Jennifer Garner's future husband.
Jennifer Garner spent time with teenagers to know how to act like one.
The slumber party scene was forced upon Gary Winick at the producers' insistence, over his strenuous objections. He felt it cut away from the Jenna/Matt romance, which was the real crux of the film. But watching it on the DVD Directors Commentary, he then felt it was one of the best scenes in the movie.
When Jenna first picks up a thong, a line "What am I a stripper?" was cut from the movie.
Gary Winick wished he'd done the magic scenes and where Jenna first sees she's an adult differently. Adult Jenna first seeing herself in the mirror was a deliberate homage to Big (1988), when Tom Hanks first saw himself as a grown-up.
Although Lucy is portrayed as a very pretty teenager, Judy Greer remarked on the Special Edition DVD that she was more 'like a geek' at that age.
At the office, when Jenna's secretary answers the phone and the man says, "Put that little bitch on the phone...tell her to call Todd", it is Mark Ruffalo's voice.
The blindfold Jenna is wearing when she is 13 is made out of the same material/pattern as the eye cover she is wearing when she wakes up when she is 30. The blindfold and eye cover were both designed by Cris Notti, an accessories designer based out of Los Angeles.
The celebs on Poise's Wall of Shame posed for real.
Sean Marquette wore a fat suit for the film.
Gary Winick likened the scene between Jenna and Mark in Central Park to the balcony scene from Romeo & Juliet. Winick later payed homage to the play even further (with an actual balcony scene) in his final film Letters to Juliet (2010).
The producers got to use From Here to Eternity (1953) in the film for free, because Sony owned the rights to the movie.
Originally Young Matt was to be played by Jack Salvatore Jr.. Test audiences reacted negatively towards him and the girl originally playing Young Jenna (Shana Dowdeswell), so the parts were re-cast and the scenes were shot again.
Young Jenna puts her dream house that young Matt makes for her on top of the board game 'Battleship.' Later, adult Jenna asks to play Battleship at her boyfriend's house.
When Jenna first gets to Poise, her assistant says that Eminem is on the phone and needs a decision. She calls out "plain, peanut, plain!", thinking the assistant means M&M, since she doesn't know of the rapper Eminem yet
It was shipped to theatres under the name "Sugar and Spice".
Many of the Michael Jackson: Thriller (1983) dancers were choreographer Marguerite Pomerhn Derricks' own dancers, and one of them was producer Gina Matthews.
The scenes on Jenna's 13th birthday were shot twice with two different wardrobes. In the movie trailer young Jenna is wearing a multicolored top and has her hair down but in the movie she is wearing a blue top and her hair is up.
When Jenna announces, "I also strongly suggest we take apart our FOB, overhaul the BOB..." She's referencing magazine publishing industry acronyms which stand for "Front of Book" and "Back of Book" and refer to the short articles placed at the front and back of the magazine.
Jenna's birth date is 26 May 1974.
Director Gary Winick was not a fan of Jennifer Garner's TV series Alias (2001). She took a break from the show to make 13 Going on 30 (2004). It was her first starring role in a movie.
Gary Winick structured the film as a series of stages, following Jenna's growth, self-discovery and eventual redemption.
Choreographer Michael Peters received a posthumous credit, since Michael Jackson's Michael Jackson: Thriller (1983) is used in the film, and he performed the choreography for it. He died in 1994.
The color of the small dollhouse that Matt builds for Jenna is the same color as the full size house they end up in at the end of the movie.
Gwyneth Paltrow, Hilary Swank and Renée Zellweger were all considered for the lead role.
When Jenna's parents videotape her as a teenager, the camcorder footage was made to look grainy, as if it were really taking place in 1987.
Before they settled on Poise, Sizzle was to be the name of Jenna's fashion magazine.
Young Matt Flamhaff listens to "Burning Down the House" by The Talking Heads at Jenna's 13th birthday party. The drummer for the Talking Heads, Chris Frantz, was also a member of his wife's group, "Tom Tom Club" at one point in his career. Tom Tom was Lucy Wyman's nickname as a 13-year-old in the movie.
A scene where Jenna sees a doctor was shot but cut.
Niels Mueller, who co-wrote the script for Gary Winick's Tadpole (2000), did an uncredited re-write on this movie's screenplay.
The train scene was filmed on the exact same train Gary Winick used in Tadpole (2000), for that film's very first scene.
The film takes place on May 26, 1987 and in 2004.
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Spoilers 

The trivia items below may give away important plot points.

When Jenna wakes up and she is 30, she is terribly lost in her apartment. In order to know where she is, she quickly takes a look at some mail she received. One of the envelopes shows that the letter was sent by Sparkle. This will have great significance later in the movie.
Gary Winick wanted to end the film with Matt and Jenna's wedding, but the studio insisted on seeing them live happily ever after.
When Jenna confronts Matt as he is dressing for the wedding, a book with the title "Time's Arrow" can be seen on the shelf beside her. The book is a novel by Martin Amis, about a man who experiences his life in reverse: the book opens as he becomes conscious as a very old man near death, and proceeds backwards through his life, ending when he is a small child.
Jennifer Garner's first scene was crashing Matt's wedding, one of the last scenes in the movie. Jenna was supposed to get to the wedding by hitchhiking, but the writers wanted to do a scene with Jenna and an adult Chris Grandy, so they made him into her cab driver.
Jenna turns 30 years old 13 minutes into the movie.
Despite playing a 13-year-old, Christa B. Allen (Young Jenna) was only 11 during filming.

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