Sex and the City 2 star Cynthia Nixon and her partner Christine Marinoni welcomed a baby boy on Monday, People magazine reported.

Marinoni gave birth to the couple's son, Max Ellington Nixon-Marinoni.

“Christine and baby are doing great,” Nixon's publicist told the magazine.

Nixon, 44, and Marinoni, 43, began dating in 2004. They announced they were engaged in 2009 as New York lawmakers geared up to debate a gay marriage bill. The couple campaigned heavily for its passage. Senators, however, rejected the bill, leaving the women unable to marry in the Empire state.

Last spring, Nixon suggested they'd get married in Iowa. Marinoni, however, nixed the idea, insisting the couple would wait to get married in their home state.

Nixon began dating Marinoni after she split up with her boyfriend of 15 years, Danny Mozes. Nixon and Mozes share custody of two children, fourteen-year-old Samantha and eight-year-old Charles.

Other openly gay celebrities who recently became parents include singer Elton John and Neil Patrick Harris, star of the CBS sitcom How I Met Your Mother.