Clueless costars Silverstone and Rudd reunite at an N.Y.C. movie premiere. Plus: Kate & Pippa, Hilary Duff, Taylor Lautner and more

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With 3-month-old son Bear Blu at home, new mom Alicia Silverstone steps out to support former Clueless costar Paul Rudd at a special New York City screening of his latest comedy, Our Idiot Brother, Monday night.