Just as Facebook announced it had 1 billion friends, twins Cameron and Tyler Winklevoss stepped out with two nearly identical-looking friends of their own, Brazilian models Marina Theiss and Amanda Salvato.

The twins and their dates — both sultry brunette beauties — stepped out on a group date Wednesday night for the premiere of the EPIX James Bond documentary “Everything or Nothing: The Untold Story of 007” at MoMA. They stuck close at the after-party at the Metropolitan Club, confusing other guests as to which Winklevoss was with which model, or if they were in fact seeing double.

The twins, who have pursued numerous legal battles with Mark Zuckerberg over the founding of the social networking site, strolled into the museum hand-in-hand with the Brazilian stunners. Predictably, sources close to the tech twins insist they are “just friends” with the ladies.

Theiss, who’s repped by Ford Models, and Salvato, who’s repped by Select and has appeared in Maxim, kept the statuesque former Olympic rowers company while they mingled with guests including “License To Kill” villain Robert Davi, Solange Knowles, Jeffrey Wright, Gloria Reuben, Theophilus London and Chace Crawford.

Meanwhile, Chris Noth drew attention from female fans, including model Kate Upton, who appeared nervous to meet the man still known as Mr. Big at the after-party.

Noth, however, should be the nervous one. While sitting in the theater before the movie started, he was asked by a friend for his cellphone number. Noth obliged, whispering the number discreetly. But the hard-of-hearing buddy repeated the digits loud enough for surrounding guests to hear, prompting several of them to type his number in their own phones. He shouldn’t be surprised if he gets a few prank calls from girls named Carrie.

Noth sent us a response (quoting “Mission Impossible”) last night: “In the spirit of 007, my cellphone will self-destruct in 5 . . . 4 . . . 3 . . . 2 . . . ”