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Mary-Kate and Ashley Olsen were back in New York to help Jenni Kayne celebrate her fall line. The trendsetting twins, who travel in the same L.A. social circles as the designer, appeared with two bodyguards (one per twin), who warded off approaching reporters. Petra Nemcova was also in the front row with cameras in tow. Nemcova explained that she is mentoring three models as part of her new reality series. "I met Jenni for the first time today, but I am just here to sit in the audience and be a proud mama to the girls," Petra said, beaming.

—Reporting by Polly Blitzer and Suzanne Zuckerman

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