Backstage Wednesday at Michelle Smith’s Milly show at the Promenade tent in Bryant Park, the designer’s daughter, Sophia, age three, sat on the floor with her babysitter wearing a black skirt, white blouse and taupe shearling vest, looking as unperturbed as the fashion veteran she is, amid the whirl of last-minute preparation. Sophia, who has been attending her mom’s shows for the last four seasons, was practicing eating like a model, picking at carrot and celery sticks in a cup. Meanwhile, in the main part of the tent, Julia Stiles, Amanda Hearst and Elisabeth Hasselbeck made their way to their front-row seats. Hasselbeck, of “The View,” wasn’t the only television news personality at Milly — Kimberly Guilfoyle, who hosts Fox News Channel’s “The Lineup,” a crime-based show that covers political and entertainment news, was in the front row chatting with Hitha Prabhakar, a fashion and retail expert and contributor to CNN and CNBC. Coincidentally, Hasselbeck two years ago was rumored to be leaving the ABC program for an anchor seat at Fox News Channel, but she stayed put.