Leonardo DiCaprio on best behavior at sexy Halloween bash

The sign of the times is Leo.

Partygoers at a lower Manhattan Halloween bash were left buzzing about the fact that Leonardo DiCaprio didn’t approach any of the beautiful women at a 40-plus-person party that was stocked with models who appeared to be just his type.

“He arrived with five friends, wearing a baseball cap, and talked to nobody outside of his group,” according to one insider. “I mean no-bod-y.”

We’re told that even when DiCaprio’s “ambassadors” made the rounds, they very politely asked the women they met for their business cards, then went back to socializing with one another.

“Leo had a drink and ate something without hardly moving,” marveled our snitch. “His posse kept him very insulated.”

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According to our insider, “The day of the dark VIP room is over — it’s too dangerous.”

Our jet-setting source says caution has become the new norm at celeb-heavy events like this one.

“There’s apprehension out there about the way you can talk to women,” said our spy, reasoning that sexual impropriety charges against Hollywood hotshots like Kevin Spacey and Harvey Weinstein has changed everything. DiCaprio released a statement last month praising “the strength and courage” of the women who have spoken up against Weinstein, who produced some of the star’s films, including “Django Unchained” and “The Aviator.”

“(DiCaprio) has always been guarded, but it seems different now,” said our source. “These guys have to be careful.”

We’re told that a partygoer snapped a photo of DiCaprio, which prompted one of his pals to politely ask that person to delete the picture. However, that same source says it’s well known that DiCaprio photos have little value to paparazzi.

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“He always wears the same thing and looks the same, so you can never tell when or where a picture was taken,” we’re told. “They’re hard to sell.”

This get-together was “Halloween-themed” but it wasn’t a costume party.

Earlier in the week, the Los Angeles Times got a hold of a nondisclosure agreement that DiCaprio’s Greenhour production company required employees to sign if they wish to work with the “Titanic” star. That NDA reportedly stipulates a “long list of offensive/inappropriate material” that is considered confidential information.