Cynthia Nixon has married her long-term partner Christine Marinoni.

Sex and the City actress wore a custom dress by Carolina Herrera for the ceremony, which was held in New York yesterday.

Cynthia Nixon’s publicist confirmed to People: “Cynthia Nixon and her girlfriend, Christine Marinoni, were legally married in the state of New York.”

No further details about the ceremony are currently available.

Cynthia Nixon, 46, have a son Max Ellington Nixon-Marinoni, 15 months, whom Christine Marinoni, 45, gave birth to last year.

They have not revealed the details of the child’s biological father.

The actress also has a daughter Samantha, 16, and 10-year-old son Charles with photographer Danny Mozes.

Cynthia Nixon has married her long-term partner Christine Marinoni

Cynthia Nixon ended her 15-year relationship with Danny Mozes in 2003.

She met Christine Marinoni at an education rally in 2002 and they became a couple two years later.

The actress and education activist got engaged in 2009 at a rally to support gay marriage in New York, which was not legal at that time.

Cynthia Nixon and Christine Marinoni decided to wait to marry until it was legal to do so in New York state, which occurred last summer.

Speaking in 2010, Cynthia Nixon said: “I’m enjoying being engaged very much.

“I don’t mind a long engagement, which this one is surely turning out to be.”

When asked about her sexuality, Cynthia Nixon once explained: “In terms of sexual orientation, I don’t feel I’ve changed.

“I’d been with men all my life and I’d never fallen in love with a woman. But when I did, it didn’t seem strange. I’m just a woman in love with another woman.”

In 2008, Cynthia Nixon revealed she had beaten breast cancer which was diagnosed during a routine mammogram two years earlier.

She went on to play a cancer patient on stage too, shaving her head for her role in Wit.

Cynthia Nixon will compete for a Tony Award next month after earning a nomination for best actress for the part.