After Jenna Rink's 13th birthday party where her friend Lucy plays a cruel prank on her, she promptly makes a wish that she could skip adolescence and be 30. With the help of some wish dust given to her by her unpopular best friend Matty, her wish comes true. She wakes up to find that her 13-year-old self is now inhabiting the body--and life--of a 30-year-old, high-powered, New York magazine editor. Frightened by her new adult life, Jenna (Jennifer Garner) seeks the help of Matty (Mark Ruffalo), but he hasn't spoken to her since high school. Unfortunately, as she uncovers the details of the time she skipped, she learns that perhaps she hasn't made the best decisions. Similar to the 1988 Tom Hanks vehicle BIG, 13 GOING ON 30 benefits from the undeniable appeal of Garner, who amusingly exudes the awkwardness and energy of a teenager. Meanwhile copious '80s pop culture references, an energetic soundtrack, and vibrant colors provide instant, foolproof nostalgia. Director Gary Winick (TADPOLE) has crafted an undeniably fun picture for any age or gender.
Jenna is a typical girl who is approaching her teens and who just wants to grow up - as fast as possible. After her 13th birthday she decides that she wants to reach 30 as soon as possible - and next morning she wakes up to find that she is 30. Jenna then has to find out what has happened in the intervening years.