Jennifer Garner plays a gawky adolescent who magically turns 30 after making a wish on her 13th birthday, but she’s also turned into a petty and shallow woman. Could a reunion with her formerly sloppy friend from junior high (Mark Ruffalo) help her reclaim her youthful innocence? This is more of a romance than its obvious model, Big, and Garner has nowhere near the comic presence of Tom Hanks.