INFO:

Jennifer Garner, Mark Ruffalo and Judy Greer reunite in honor of the 20th anniversary of their film, '13 Going on 30.' The stars get together in a video posted to Instagram to reminisce about their blockbuster rom-com, including a Michael Jackson 'Thriller'-inspired dance break! The actors break down iconic scenes from the movie, and reflect on how times have changed 20 years later.