A funny and charming romantic comedy, 13 Going On 30 is a gender-tweaked take on Tom Hanks' child-in-adult-body hit Big. When her 13th birthday party goes pear-shaped, Jenna Rink (Christa B Allen) wishes she was 30. And, with a sprinkling of movie magic, she wakes up as a glam, 30-year-old magazine editor in Manhattan, played by Jennifer Garner. Predictable, easygoing laughs ensue, as she tracks down old school friend Matt (Mark Ruffalo) and realises what an immoral schemer she's become.