It's a boy for Girls star Jemima Kirke!
Their son joins 2-year-old sister Rafaella Israel in the family brood.
"Yesterday was amazing. One of my friends had a baby, one got engaged and the doctor told me the bump on my tongue is nothing to worry about," Dunham wrote Nov. 21.
Ironically, the storyline for Kirke's character, Jessa, on the HBO comedy's inaugural season revolved around a pregnancy that wasn't to be. But Kirke made no bones about what was going on with her in real life, posing for a spread in Vice in the full bloom of pregnancy.
"If I have a boy, I'll probably just tell him to be nice to women," she told the magazine. "Being humble and sweet is the hardest thing you can do."
The second season of Girls premieres Jan. 13.