Cynthia Nixon Engaged to Wed, Rallies for Equality

The Sex and the City star and her longtime girlfriend, Christine Marinoni are engaged to be married

While rallying for gay rights in New York this weekend, Sex and the City star, Cynthia Nixon, announced her engagement to longtime girlfriend Christine Marinoni, Nixon's rep confirms to E! News.

The couple has been together since late 2003, shortly after Nixon split from her husband, Danny Mozes. The exes share custody of their two children, Samantha, 14, and Charles, 8.  

Access Hollywood first reported the engagement, which Nixon shared with audiences during the Love, Peace and Marriage Equality rally in New York City. The actress and Marinoni became engaged last month and are currently working to support the new gay-rights bill proposed by New York Governor David Paterson. The goal is to achieve equality for same-sex unions.

Nixon and the rest of the Sex and the City gang are set to start filming the movie's sequel this summer.