Seth Rogen has become quite the mensch.

The comedian and his dad, Mark, were honored Monday in New York City by Jewish social-justice organization the Workers Circle at the ritzy Essex House overlooking Central Park. The two received the Generation to Generation Activism Award at the event, which Rogen agreed could only be described as “socialist chic.”

“It’s very fancy. It’s socialist fancy,” the 37-year-old “Pineapple Express” star tells The Post. “We should be doing this in the shtetl.”

Rogen’s award solidified him as a Jewish icon — something he’s been ruminating on a lot lately. The Vancouver, British Columbia, native, who grew up with the religion, was filming “An American Pickle” in Pittsburgh last year during the Tree of Life synagogue massacre. The incident was the deadliest attack on Jews in US history.

Rogen’s Jewish culture has often been the subject of his comedy — see “Knocked Up,” “The Guilt Trip” and “The Night Before,” to name a few — but the tragedy made his experience much darker.

“When you’re Jewish, the idea that people hate Jewish people is abstract and confusing in many ways,” he said. “And then something like that happens, and it reaffirms the otherness that people feel toward us.”

Rogen appears to be bringing that consciousness to next year’s “An American Pickle,” in which he’ll star alongside “Succession’s” Sarah Snook. The time-traveling movie is based on a short story by Simon Rich.

Rogen at the gala.Getty Images

Rogen will play Herschel Greenbaum, a Yiddish-speaking immigrant to the US in the early 1900s, who falls into a pickle barrel and emerges in modern-day Brooklyn.

He says it won’t be an explicitly Jewish film. But he’s finding there’s no way to separate that from his work.

“That’s what’s funny about being Jewish. Even if you’re not religious, you’re Jewish: You can opt out of it.”

At the gala, Rogen fully opted in, peppering anecdotes with his favorite Yiddish words.

“I was always told I have shpilkes as a kid by my grandmother when I couldn’t sit still,” he says of the Yiddish word used to mean a nervous energy.

In talking about the honor of receiving the award alongside his father, a longtime activist, Rogen said “It’s a lot of nachas,” using the Yiddish word for pride.

During the gala, a live auction for a cruise and a 10-minute Skype session with Rogen were on offer — where he topped off his Yiddish jokes with a bit of Jewish-mother humor.

“My mom almost bought the 10-minute Skype [session] with me just so she can talk to me,” he joked, impersonating her with a “You never call!”

And, in summing up the gala, where defiantly treif cheeseburgers were served, he joked, “There’s a large amount of Jewish mother energy. I’ve been asked by 200 women if I’ve had enough to eat.”