It's 1987, and geeky Jenna just wants to be popular. After her 13th birthday party goes awry, Jenna wishes she could just be 30 instead -- only to wake up and discover that she's flash-forwarded 17 years. Now a sexy, successful magazine editor, Jenna (Jennifer Garner) finds out that being an adult isn't necessarily all it's cracked up to be. Mark Ruffalo, Judy Greer and Andy Serkis co-star in this charming romantic comedy in the tradition of Big.