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.