Los Angeles - Leighton Meester gave birth to her baby girl seven weeks ago.
The former Gossip Girl and husband Adam Brody were reported to have welcomed their first child into the world recently and it has now emerged little Arlo Day was born on 4 August.
According to TMZ, who have obtained a copy of the baby's birth certificate, Arlo was born 12 minutes after midnight at Whittier Hospital in Los Angeles.
The couple tied the knot in a secret ceremony in January 2014 after first meeting on the set of their 2011 film The Oranges.
A source said at the time: "Leighton and Adam got married in Northern California by the ocean a couple of weeks ago. It was a very small and intimate wedding with close family and friends. It was beautiful."
The 29-year-old star first hinted she and her 35-year-old beau were trying for a baby during a recent magazine interview.
She said: "Most people I know are starting to get married. It'll be kids next. I like the grown-up stuff. I like having a house. I've got dogs.
"I started Gossip Girl when I was so young. And once it was over, I wanted to do things that were exciting and challenging and more me - more my adult taste."
Meanwhile, Adam previously joked he is hoping to have a very big family with Leighton.
Asked how many children they were planning on having, he said: "I say twelve. And I decide."