Cynthia Nixon announced her engagement to girlfriend

Hot Cynthia Nixon

"Sex and the City" star Cynthia Nixon announced her engagement to girlfriend Christine Marinoni at a gay rights rally over the weekend, celebrity web sites reported on Monday.

Beauty Actress Cynthia Nixon

Nixon, 43, told the crowd at a "Love Peace and Marriage Equality" rally in New York that she and Marinoni got engaged last month and planned to marry, Access Hollywood said.

Cynthia Nixon

Nixon and Marinoni, an education activist, have been together for about 5 years since the actress split with long-time companion Danny Mozes, with whom she had two children. Sunday's rally was held to support a bill that would legalize same-sex unions in New York.

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Nixon plays workaholic lawyer Miranda Hobbes in the "Sex and the City" movie and TV show. All four lead actresses have signed on for a movie sequel.

Cynthia Nixon