K.J. Yossman Beloved 2004 comedy “13 Going On 30,” which featured Jennifer Garner in the title role, is set to get a musical adaptation from the film’s original writers. Josh Goldsmith and Cathy Yuspa are working on a stage reimagining of the movie, which also starred Mark Ruffalo as the boy next door as well as Andy Serkis as Garner’s boss and Judy Greer as her best friend.