Sex and the City star Cynthia Nixon says the nation is at a turning point in the fight for gay marriage.

The 45-year-old actress has been a vocal proponent of giving gay and lesbian couples the right to marry in her home state of New York.

Last month, she paired up with New York rangers winger Sean Avery. The actress and hockey player traveled to Albany to lobby lawmakers on the issue.

Now with the law about to take effect on Sunday, Nixon reminisces on the moment she learned she could now legally marry her fiance, Christine Marinon.

Nixon recalls that she, Marinon, their children and a few friends were made aware that the New York Senate had approved marriage equality from a group of strangers as they waited on a subway platform.

“They called out to us, we cheered, and others did too,” Nixon wrote in an op-ed published in Newsweek. “Somebody offered to take a picture to commemorate the moment, and it's such a great shot: all different ages, down in the subway, looking so proud and so, well, New York-y.”

The nation, Nixon added, is “at a turning point in the fight for marriage equality.”

“For the first time, a majority of Americans say gay people should be allowed to be married – not just allowed to have civil unions, but to marry. The distinction is important: when you say to somebody, 'This is my wife' or 'This is my husband,' everybody understands. A civil union? Well, what is that?”

Nixon, however, hasn't said when she and Marinon will take advantage of that new-found right.