The 38-year-old actress used Instagram to share their news and announce their little boy’s unique name.
“Marco and I are elated to share the news of the the birth of our son Zen,” the Guardians of the Galaxy star wrote.
“We couldn’t feel more blessed with the new addition to our family. #threeboys… oh boy!”
Zen is the little brother of twin boys Cy Aridio and Bowie Ezio.
Zoe recently told Us Weekly why she refuses to show her kids’ faces to her 1.3 million Instagram followers.
“It has to do with respecting who they are,” she said.
Listen: Don’t kiss the baby, and other rules about newborns that people should know. (Post continues after audio.)
“They’re too young to tell me how they would feel. They don’t know if they’re comfortable with that. It’s too violating
“I can share them to the point that my husband and I are comfortable. I’ve never felt the impulse to show their faces. The trolling online is pretty disgraceful. I’m giving them a chance to have their own life.”