Little White Dress
Allen Berezovsky/WireImage; Courtesy Photo

Ahna O’Reilly stepped out for a good cause in this quintessential Little White Dress at the second annual Hilarity for Charity event in Hollywood, which raised funds for the Alzheimer’s Association with laugh-out-loud performances by comedians like Mindy Kaling and Seth Rogen. The look is Juicy Couture’s Scallop Lace dress, also available in black and clementine versions, for $268 at juicycouture.com. Pssst: Scoop up the flirty frock now—it’s on sale for $190!

Plus, shop more great celebrity looks.

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