Sweet couple, sweet tooth! Nicky Hilton and boyfriend dine out in Vegas! Plus who else?

Nicky Hilton

Nicky Hilton

Vienna Girardi

Fashion designer and Hollywood socialite, Nicky Hilton, dined at Sugar Factory American Brasserie (www.SugarFactory.com ) at Paris Las Vegas last night with long-time beau, producer David Katzenberg. The cute couple dined on Turkey Sliders, Mac and Cheese Pops, Chicken Bites, an Angus Filet and shared a Passion Punch goblet cocktail. After her delicious dinner the fashionista, dressed in a gorgeous Alice & Olivia dress, silver-studded Jimmy Choo heels and her very own Nicky Hilton jewelry, picked up a few after-dinner sweets in Sugar Factory’s flagship retail store, including a five-pound Gummy Bear and Jelly Belly Sours.

Also dining at the hot spot was reality television starlet, “The Bachelor” winner Vienna Girardi. The beauty was celebrating her 25th birthday with friends and family, as the group dined on Chicken Skewers, Roasted Chicken Breast, the Pacific Salmon and New York Strip steak. The birthday girl, dressed to kill in a Badgley Mischka sparkling mini dress and black strappy heels, loved the Lollipop Passion Goblet, especially. The eatery surprised Girardi with a delicious birthday ice cream sundae and she just couldn’t wipe the smile off her face. She also scooped up some peanut butter M&M's, Sour Patch Kids and gummy letters at Sugar Factory before leaving to enjoy the rest of her big night out.

Gossip Girl cast member Luke Kleintank was also spotted a few tables down, celebrating his 21st birthday and enjoying Roasted Chicken Breast and drinking a Passion Punch Goblet with a group of friends.

Sugar Factory American Brasserie is an American take on a traditional French brasserie, serving delicious cuisine all day, and all night, along with an oversized retail store and signature Chocolate Lounge. Other Sugar Factory retail stores are located at The Mirage and Miracle Mile Shops at Planet Hollywood.

Photo credit: David Becker/WireImage