Steven Spielberg's "Quelle Barn" is the original. Converted barns now define the most authentic celebrity Hamptons houses — 18th-century wood meets modern lighting.

Owners of celebrity Hamptons houses spill into Sag Harbor on Saturdays — wine shops, bookstores, and farmers markets are where the actual social scene lives.

Inside celebrity Hamptons houses, the August signature is string lights over a brick patio surrounded by white hydrangeas. It's a uniform, not a trend.

White wicker rockers, blue and white striped pillows, a glass pitcher of lemonade — celebrity Hamptons houses all read from the same Ralph Lauren-era playbook.

For celebrity Hamptons houses on Georgica Pond and Mecox Bay, a private dock with a small sailboat is the morning ritual. Steven Spielberg's setup is the textbook.