New York University’s popular Web version of “The City” is casting a wide net to expand its cast.

Sean Patrick Murray, the young creator of Internet series “Under the Arch,” which follows the lives of nine NYU students and their friends, will be hosting an open call Nov. 16-20 at the David Barton Gym on Astor Place to cast new talent for the upcoming second season of his show.

“We’re looking for anyone — aspiring actors, athletes, models, doctors, lawyers — who has a story to tell,” the recent NYU grad tells Page Six. “We want a wide spectrum of people who are all pursuing their dreams here in New York.”

Seven Webisodes of “Under the Arch,” produced by Michael Flutie‘s Madwood Entertainment, have already been put online. (Flutie is also reportedly working on a reality show with Amy Sacco.) Murray says the next batch of episodes will be ready by mid-December. “Basically, we’re going to cast and then shoot and edit everything to get it ready as soon as possible,” he says. The focus, for now, will stay on undergrads. “It’s lightly scripted,” he says. “We’re trying to toe the line between reality and fiction.”

Meanwhile, one of the show’s stars, aspiring actress Ariana Madix, has become tabloid fodder after being linked to Jets quarterback Mark Sanchez, whom she met while bartending at Johnny Utah’s in Midtown. (Sanchez stopped by again last week, this time playing beer pong against Yankees pitcher Joba Chamberlain till 1 a.m.)

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“Reports that I gave him my phone number and things like that are completely wrong,” Madix, who also plays for the New York Majesty lingerie football team, tells us. “I have a live-in boyfriend. Mark has come in to hang out a few times. We’re friends.”