In leafy New Canaan, Connecticut, Joyce Sitterly endowed a Greek Revival house with a British-accented decor that’s simultaneously chic and comfortable, witty and wild. In the living room, the U.S.-born, London-based interior designer laid a museum-quality rug from the dealer Peter Pap on the floor and arranged on it a custom scallop-edged silk-velvet sofa of her own design and a Karl Springer waterfall coffee table. These share space with a clutch of 1stDibs acquisitions: a Swedish mid-century chaise covered in sheepskin, a monumental Chinese altar table topped with hand-marbled obelisk lamps and a neoclassical-style games table and giltwood music chairs. “We really banished the notion of ‘country house’ so that none of the design choices seem out of place,” Sitterly says. She also referenced the natural world, incorporating draperies made from a Pierre Frey print fabric depicting Japanese gardens, together with more exotic allusions, like 1970s Anthony Redmile ostrich-egg table lamps, a Jean Roger trompe l’oeil ceramic egg from the ’60s and, from 1stDibs seller Forsyth, a Warren Platner easy chair and ottoman covered in zebra hide. In addition to her own vivid imagination, the designer took inspiration from the grand salon of Hubert de Givenchy’s French country home, Le Jonchet, which the fashion icon made “a social space with desirable and practical seating,” as well as the home of Mrs. Robinson in Mike Nichols’s 1967 comedy, The Graduate. “There’s a sophisticated playfulness to the interiors that feels like martinis must be drunk,” she says. “In abundance.”