New York’s politicians came out in droves Thursday night to celebrate Public Advocate Jumaane Williams’ wedding to fiancée India Sneed.

Mayor Bill de Blasio and his likely successor, Brooklyn Borough President and Democratic Party mayoral nominee Eric Adams, boogied with the newlyweds at their reception at the W Loft in Williamsburg.

State Attorney General Letitia James, whose investigators are interviewing Gov. Andrew Cuomo on Saturday over sexual harassment claims, also paid tribute to the couple.

Williams, who some believe is eyeing a run for governor, and Sneed — a lobbyist with Greenberg Traurig who previously worked for the mayor and in the Brooklyn District Attorney’s Office — were “cutting the rug on the dance floor,” one invitee said.

“They were phenomenal,” the guest said.

Maya Wiley, the civil rights lawyer and former counsel to de Blasio whom Williams endorsed for mayor over Adams in the Democratic primary, was giddily snapping pictures on her smartphone with the public advocate and James.

Numerous other elected officials attended, including Queens Borough President Donovan Richards, Manhattan Borough President Gale Brewer, state Senate Deputy Majority Leader Michael Gianaris, Brooklyn council members Farah Louis, Laurie Cumbo and Justin Brannan, Manhattan Sen. Brian Kavanagh and Assemblywoman Rebecca Seawright, and Staten Island Councilman Joe Borelli, among others.

Lobbyists also made the rounds — including Charlie King, a longtime pal of both Cuomo and Al Sharpton, for whom he once served as executive director at the National Action Network.

De Blasio was in a good mood — brushing off questions outside from a Post reporter about whether he was upset that Cuomo held a press conference about gun violence with Adams instead of him.

“No worries, dude,” de Blasio said.

Adams, who wore a bright red sports jacket, black leather wristwatch and black slacks, was all smiles and shook hands with everyone as he walked in.

Adams stayed for 37 minutes and departed without comment to a Post reporter.

Wiley said, “It’s a lovely event where people are just celebrating Jumanne and India, and it’s really lovely.”

“A lot of dancing and a lot of catching up. Really good party.”

She said the joyous occasion was welcome following the COVID-19 outbreak and the intense primary election season.

Some guests said it’s the first time they’ve attended a wedding reception or any large gathering since the pandemic hit.

The couple invited guests to attend the receptions in two shifts — 6:30 p.m. and 8:30.

“It was wonderful. It was the perfect way to see people,” Wiley said.

She said de Blasio “danced a little bit” but would not rate his skills.

“I’m not answering that question,” she said with a smile and a laugh.

The reception at the W Loft included a floor for dancing and a rooftop where guests chatted and admired the Manhattan skyline.

There was political buzz about the next move for Williams, who is expected to win re-election as public advocate this fall.

Political insiders viewed Williams’ trips to upstate cities last week as a strong signal that he’s keeping his options open to run for governor, with a weakened three-term, scandal-scarred Cuomo mired in investigations over sexual harassment and his handling of the coronavirus pandemic.

Sources describe the broad and diverse guest list to the wedding reception as a “chess move” by Williams.

“Jumaane is getting the pieces in place,” one guest said.

There was also chatter about whom Adams would pluck to work in his mayoral administration, with many elected city officials being pushed out of office because of term limits.

The couple recommended guests contribute gifts through a Zola and Macy’s Registry.