The 30-year-old and her husband Brian Austin Green welcomed their third child on Thursday.
And rather interestingly they have named him Journey River Green – after a year which saw Megan file for divorce, then reveal she was pregnant and then apparently reconcile.
No other details have yet to be released about the little one.
A source said: “They’re totally back together. They’ve been through a lot, but this makes more sense for the kids and the new baby … Megan is coming around but she hasn’t called off the divorce just yet.
“They recently moved to Malibu together and they’ve been touring preschools. They’re trying to get in as much special time as possible.”
The gender of Megan’s baby was revealed by her father Franklin earlier this year.
He shared: “Megan is an amazing mom. Becoming a grandfather has been a wonderful experience and brought us all even closer together.
“All I can say is they are together and they are happy.