Happy Birthday, Mary-Kate and Ashley Olsen!

By InStyle Editors Updated Jun 13, 2012 @ 10:40 am
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Credit: Warner Bros/Everett Collection; Larry Busacca/Getty Images

Double up the birthday cake—Mary-Kate and Ashley Olsen turn 26 today! To celebrate, we're taking a look back at the twins' Hollywood transformations, from Full House babies to award-winning fashion designers. See their evolution in the galleries!

MORE:• Mary-Kate and Ashley Win at the CFDA Awards• Celebrity Bikinis 2012: Ashley Olsen• Preview the Olsens' Fall Collection for The Row

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