Cynthia Nixon and Ella Emhoff were among the celebs and high-profile supporters spotted celebrating at Zohran Mamdani’s watch party after the dark-horse socialist “crushed” former Gov. Andrew Cuomo in the Democratic mayoral primary.

The “Sex and The City” star and the stepdaughter of former Vice President Kamala Harris were part of the scores of rowdy followers watching as Mamdani declared victory at his rooftop victory party in Long Island City after midnight on Wednesday.

Documenting the victory, Nixon — a bitter foe of Cuomo’s since losing to him in the 2018 gubernatorial primary — shared a photo on her Instagram Story of herself posing with her fist in the air.

“Zohran Mamdani has crushed Andrew Cuomo in the NYC primary for Mayor!!!” she captioned the snap.

Likewise, Emhoff, the ex-veep’s artist stepdaughter, shared a snap of herself screaming after the votes came in.

“GUYSSSSSS!!!! HOLY S–T,” the 26-year-old wrote on her Instagram Story.

Emhoff, who sported a blue-and-yellow Mamdani bandana on her head for the festivities, followed up with a clip of fellow supporters chanting, writing, “The energy was insane last night.”

Actor Kal Penn, who has known Mamdani since the latter was a child, also joined the raucous celebrations.

He too shared clips on social media of supporters screaming out after Cuomo eventually conceded.

The 33-year-old state lawmaker, who is a self-described Democratic socialist, defied polls and expectations as he notched a likely insurmountable 7-point lead over Cuomo in Tuesday’s primary.

“Tonight we made history,” Mamdani told his supporters at the victory party.

“In the words of Nelson Mandela, ‘It always seems impossible until it is done.’ My friends, we have done it. I will be your Democratic nominee for the mayor of New York City.”