Fashion designer Nicky Hilton is back in New York. After a week of business commitments, the socialite attended the Bridgehampton Polo over the weekend with her younger brother, Conrad, and Laura Katzenberg, the sister of her long-term boyfriend, David. (The Katzenbergs’ father is the billionaire founder of DreamWorks and is a former studio chairman of the Walt Disney Company.) The hotel heiress hosted a clambake the night of the polo and is vacationing at her parents’ Water Mill estate now. Her sister, Paris, is busy in Beverly Hills, recording her second studio album at home with boyfriend, Benji Madden, for Heiress Records, the Warner Brothers-distributed label she started in 2006.

All photographs © Patrick McMullan/PatrickMcMullan.com.

Antonia Thompson, Serena Merriman, and Catherine Fulmer

Jen de Rothschild

Kelley Hoffman and Summer Rej

Alessandra Balasz

Dabney Mercer

Poppy Delevigne and Rebecca Guinness

Downtown It girls Serena Merriman and Antonia Thompson came out to support their friend, the model-turned-designer Catherine Fulmer, at the penthouse of the Gramercy Yoo by Philippe Starck. Guests, including hotel heiress Alessandra Balasz, were treated to cocktails, a private sample sale, and a first look at Catherine’s upcoming spring/summer collection. British model and aspiring actress Poppy Delevigne, who first lived in the Upper East Side apartment of her mother Pandora’s close friend, Sarah, Duchess of York, when she moved to New York from London, also swung by the terrace to see her friend, the Vanity Fair scribe, Rebecca Guinness.

All photographs © Nick Hunt/PatrickMcMullan.com.

Dani Stahl, Charlotte Ronson, and Ali Wise

Nicky Hilton

Lydia Hearst

Shoshanna Lonstein Gruss

Mike Lohan and Lindsay Lohan

Annabelle Dexter-Jones and Samantha Ronson

It was a Ronson and Lohan family affair at the “10 Years of Gorgeous” anniversary celebration for Sephora. Fashion designer Charlotte Ronson and model Annabelle Dexter-Jones came out to the Angel Orensanz Foundation in the Lower East Side with their sister, Samantha Ronson, who was the resident DJ for the party.

A radiant Lindsay Lohan, who just completed production on her comeback comedy, Labor Pains, glowed in front of the cameras. Her brother, Ithaca lacrosse player Mike Lohan, and her mother, Dina Lohan, made their way to Manhattan to see the blonde beauty. Lindsay is debuting her third studio album, Spirit in the Dark, in November and will soon be in Bucharest, Romania to film her next flick, the appropriately titled, Dare to Love Me.

Heiresses Nicky Hilton and Lydia Hearst rounded the bunch. Nicky, fresh from Los Angeles, is in town for business. Model Lydia was the face of Sephora last winter for the beauty chain’s holiday campaign.

All photographs © Chance Yeh/PatrickMcMullan.com.

Hot on the heels of her appearance on Access Hollywood, Tinsley Mortimer was interviewed by CNBC’s Wendy Furrer for the cable channel’s “High Net Worth” program. The video includes Tinsley at a fundraiser for New Yorkers for Children, being shot for a fashion editorial in V magazine, and greeting John Galliano, the head designer of Christian Dior. It also includes footage from her flagship Riccimie by Tinsley Mortimer boutique opening in Japan and from the launch of her Tinsley Pink lip gloss for Dior Beauty at Saks Fifth Avenue, where she facilitated master make-up classes with groups of New York women.

Tarajia Morrell and Eleanor Ylvisaker

Julia Restoin Roitfeld

Ali Wise and Shoshanna Lonstein Gruss

Dylan Lauren and Robin Kent

Sharon and Ashley Bush

At the Tribeca Grand Hotel, the Cinema Society screened August, Josh Hartnett’s Sundance Film Festival-debuted drama about the post-Web 1.0 world. The Armani style ambassador is currently seeing bohemian actress Tarajia Morrell. Socialites Shoshanna Lonstein Gruss and Dylan Lauren were at the Soho Grand for the celebratory after party, as well as Earnest Sewn executive Eleanor Ylvisaker, whose business partner, denim designer Scott Morrison, dated native New Yorker Tarajia several years ago. Enthusiasts left the hotel for Sway and the Beatrice Inn for unofficial after-after-parties.

All photographs © Clint Spaulding/PatrickMcMullan.com.