Olsen and Richie grab a front-row seat at the Proenza Schouler runway show in New York City. Plus: Nicole Kidman, Ben Affleck, Jessica Alba and more

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Pals Mary-Kate Olsen (wearing a blazer from her Elizabeth and James line with sister Ashley) and Nicole Richie make a fashionable front-row appearance at the Proenza Schouler runway show Wednesday at New York City's Bryant Park.

See all the stars celebrating Fashion Week!