Shocking celebrity ages – 20 Celebrities Who Are Much Younger

Mary-Kate Olsen – 29

4. Mary-Kate Olsen – 29

Mary-Kate entered into the world as an adorable little girl in Full House. She has since moved on to become fashion designer and world-renowned entrepreneur. The years since Full House have not done her good because she certainly looks like she is way older than 29. Her eating disorder may be to blame for her early aging, but she also fights depression, especially following the loss of her close friend Heath Ledger.

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