'13 Going on 30′ fashion flashback

Fifteen years ago, "13 Going on 30" premiered in theaters, giving us some super-cute comedic moments, nostalgic middle school memories and plenty of awesome fashion. In celebration of the rom-com's big anniversary on April 23, 2019, Wonderwall.com is taking a look back at some of the film's most iconic looks starting with this ensemble. Jennifer Garner, who played all-grown-up Poise magazine editor Jenna Rink, rocked a multicolored babydoll dress while hitting the dance floor to Michael Jackson's "Thriller." She completed the look with a bedazzled butterfly necklace, bangles, dangling earrings, blue strappy heels and sparkling hair clips. Thrilling! Now keep reading to see more flawless fashion from the flick…

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Jennifer Garner rocked this adorably chic look while Jenna Rink enjoyed a day in the park in "13 Going on 30." She wore a white corset-style top with a yellow-and-pink floral print and a yellow A-line skirt paired with a matching tote bag, a silver watch and a pink flower pendant necklace. Adorbs!

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Even her cover-up was cool! Jennifer Garner's Jenna Rink sported a soft pink-and-green floral polka-dot silk robe while dancing in her enviable walk-in closet.

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Jennifer Garner sparkled in this all-pink ensemble in "13 Going on 30" — a pale pink cardigan atop a spaghetti-strap tank and pink floral skirt, all accessorized with a brown clutch.

Christa B. Allen looked like a true '80s teen fashionista in this flashback "13 Going on 30" scene. Young Jenna Rink wore a bedazzled turquoise off-the-shoulder top and a black skirt with blue, green and white polka dots. She completed the look with a white belt, a bedazzled scrunchie and turquoise star-shaped dangle earrings. Awesome!

Judy Greer's character — Jenna's BFF and magazine underling, Lucy Wyman — looked fierce while attending a work party with the boss in "13 Going on 30." The beautiful blonde hit the bash wearing a fitted tea-green lingerie-inspired dress with black lace accents accessorized with a drop necklace and dangling earrings.

Jennifer Garner's Jenna Rink wore these cozy, cute, floral-print pink PJs while enjoying a sleepover with her neighbors in "13 Going on 30." She made sure to grab a pink scarf to finish her look during their singalong to Pat Benatar's "Love Is a Battlefield."

Jennifer Garner donned her character's fave color — pink — on the official "13 Going on 30" movie poster. She rocked a hot pink nightie with lace trim and a tailored polka-dot coat trimmed in burgundy ribbon paired with a pink clutch and silver heeled sandals.

Jennifer Garner wore this feminine, chic look while out on a date with Mark Ruffalo's character, Matty Flamhaff, in "13 Going on 30." Her white short-sleeved top and gray A-line skirt, both with pink floral accents and trim, were so cute!

Jennifer Garner's character proved she really was a 13 year old trapped in a 30 year old body when she rocked this experimental, fashion-forward look: a cream-colored biker jacket over a gray-green top with wacky chopstick hair accessories that we can't take our eyes off!

Jennifer Garner continued her character's love of soft pastels and polka dots in this "13 Going on 30" scene in Central Park. The actress donned a multi-colored polka-dot scoop-neck blouse with a beautiful yellow skirt and pink heeled espadrille sandals.

Judy Greer reflected her character's more sinister nature in this dark look in "13 Going on 30" when she filmed a scene wearing a black top with black bootleg pants, black heeled sandals, a black tote and a light green leather jacket.

Jennifer Garner's Jenna Rink looked lovely in this tan suede jacket, white polka-dot button-up shirt and pink striped A-line skirt in "13 Going on 30." She completed the look with a large leather-trimmed white tote.

Mark Ruffalo's photographer character in "13 Going on 30" looked classically handsome in a dark gray T-shirt and relaxed blue jeans — simple yet stylish.

Jennifer Garner looked absolutely adorable on another "13 Going on 30" poster with her white A-line dress covered in multicolored polka dots, strappy pink heeled sandals, pink dangling earrings and hot pink purse.