XOXO, Gossip Boy.

Penn Badgley and Domino Kirke welcomed their first child together, a baby boy, in August.

“His heart shaped home ❣️ #40dayspostpartum,” Kirke, 36, wrote in a post to Instagram on Sunday along with a photo of the placenta printed on a piece of paper.

She also posted a photo of herself sleeping next to her newborn to her Instagram Story but did not reveal his name.

The couple first revealed that they were expecting a baby together in February and Kirke shared that she had previously had two miscarriages.

“After two miscarriages in a row, we were ready to call it,” she wrote at the time. “I stopped trusting my body and started to accept the fact that I was done. As a birth attendant, I’ve seen and heard it all. It takes everything I’ve got to detach lovingly from the losses I’ve been present for and be in my own experience.”

As Page Six exclusively reported, Kirke and 33-year-old Badgley’s baby will be born in LA.

While this is baby no. 1 for Badgley, this is Kirke’s second child as she also shares a 12-year-old son Cassius Rile with musician ex Morgan O’Kane.

The “Gossip Girl” actor and Kirke, who is the sister of “Girls” star Jemima Kike and actress Lola Kirke, first met in 2014 and got married three years later in a Brooklyn courthouse.