• GOOD 'NIGHT' photo | Mary-Kate Olsen

Credit: Shahar Azran/WireImage

Published: Monday August 26, 2013 06:00 AM EDT



Date night comes with a good cause for Olivier Sarkozy and Mary-Kate Olsen, who step out at Saturday's Apollo in the Hamptons: A Night of Legends benefit in East Hampton, N.Y.

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