A third Democratic member of the City Council, Antonio Reynoso of Brooklyn, has snubbed Gov. Andrew Cuomo to endorse rival Cynthia Nixon.

“Politics-as-usual are not getting it done. So we do it different in north Brooklyn, “ Reynoso said at a press conference in Williamsburg.

He joins colleagues Carlos Manchaca of Brooklyn and Jimmy Van Bramer of Queens in shunning the two-term incumbent.

Reynoso, who represents Williamsburg and Bushwick in northern Brooklyn, likened Nixon’s campaign to his own successful effort to knock off former Brooklyn Democratic Party chairman Vito Lopez in the 2013 Council race.

“Cynthia Nixon didn’t ask the establishment politics for a seat at the table. Cynthia Nixon didn’t ask the county’s political machine’s blessings on whether or not she should run,” Reynoso said.

“Cynthia Nixon is running on her own accord. Her own conscience is leading her to this point and in north Brooklyn, we know a little bit about running against establishment politics … We know what it is like to run against the machine.”

He was joined by other members of his New Kings Democrats political club.

Reynoso argued that Cuomo has failed to address transit service problems, pass the Dream Act, or enact campaign finance reform, tougher rent regulations or more equitable school funding.

“We can’t simply write Albany off because of its weak leadership and dysfunction. Albany, more importantly Cuomo, must be held accountable for the lack of progress made in the state government,” Reynoso said.

Sources close to the Nixon campaign said Alexandria Ocasio-Cortez’s stunning congressional primary victory over Rep. Joe Crowley last week has galvanized support for Nixon’s campaign.

Reynoso’s district includes many young progressives — the type of voters who helped lift Ocasio-Cortez.

But Cuomo is not without supporters in the council. Last week he won the backing of Council Speaker Corey Johnson.

The Cuomo campaign also said Cuomo has secured $555 million for “community schools” to provide additional social support services.

Cuomo and Nixon will face off in the Sept. 13 Democratic primary.