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Jennifer Garner (Jenna Rink): Following "13 Going on 30," Garner wrapped Alias and went on to star in "Juno," "Ghosts of Girlfriends Past," and "Dallas Buyers Club." She married Ben Affleck in 2005. The couple split in 2017, but continue to co-parent their three children.
Mark Ruffalo (Matt Flamhaff): Ruffalo went on to star in rom-coms such as "Rumor Has It..." and "Just Like Heaven" as well as critically acclaimed films like "Shutter Island" and "Spotlight." He is probably best known for playing Hulk in the "Avengers" saga.
Christa B. Allen (Young Jenna): After "13," Allen appeared in "Grey's Anatomy," "CSI," "Revenge" and "Baby Daddy." She also played a young Jennifer Garner in "Ghosts of Girlfriends Past."
Sean Marquette (Young Matt): Marquette made appearances in "CSI," "Ghost Whisperer," "Monk" and most recently, "The Goldbergs."
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'13 Going on 30' Turns 15 -- See What the Cast Looks Like Now!

Jennifer Garner (Jenna Rink): Following "13 Going on 30," Garner wrapped Alias and went on to star in "Juno," "Ghosts of Girlfriends Past," and "Dallas Buyers Club." She married Ben Affleck in 2005. The couple split in ... READ MORE
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