The `Up in the Air` actress - who already has 22-month-old son Fynn with husband Renn Hawkey - had a "happy and healthy" daughter named Gytta Lubov on November 4, her spokeswoman as confirmed.
Having a daughter was a surprise for 37-year-old Vera, as she admitted in May that she and Renn had no plans to find out the gender of the tot.
She said: "We don`t know what we`re having yet. I just want to have a healthy baby."
Vera had been lined up to star in Madonna`s movie `W.E.` - which tells the story of Britain`s King Edward VIII, who abdicated the throne to marry US divorcee Wallis Simpson - but pulled out after finding out she was pregnant.
The Oscar-nominated actress has previously spoken out about how she can`t remember what life was like before she became a parent.
She said: "I`ve played a lot of mothers in my movies and I come from a massive family where the youngest is like 20-something years younger than I am.
"My mother had seven kids and I`ve sort of been studying her my whole life so I knew what to expect. But the funny part is, since having my son Fynn, I don`t remember what life was like before parenthood."