Browns has been an English institution for four decades now. Mrs. B isn’t one to let an occasion like that go under-celebrated. For the store’s 40th anniversary, the pioneering retailer—who brought Ralph Lauren, Calvin Klein, and Sonia Rykiel to England and was an early booster of Hussein Chalayan and Marios Schwab—put together an exhibition, opening tomorrow, of 40 Browns “ambassadors” in finery pulled from its archives. Paolo Roversi shot Marc Jacobs in Halston (above), Eva Herzigova in Mark Fast, and Ann Demeulemeester in her own collection (both below), among many others. And as for Mrs. B herself? The lady chose Marni for her close-up (bottom, left).