The actress, 36, took to Instagram on Monday, May 27, to announce the birth of the new member of the family.
Alongside a photo of her newborn daughter's tiny toes, she captioned the post, "We had a baby a couple weeks ago… Here are her feet."
Here's the post, check it out.
View this post on Instagram
As previously reported, sources confirmed in January that the husband-wife duo was expecting a baby. The actress was spotted with a baby bump in a flowy Miu Miu gown at the Golden Globes 2019 on January 6.
The Jumper actor is also the father of a 5-year-old son, Jack, 5, who he shares with his ex-wife, Evan Rachel Wood.
The former couple had tied the knot married in 2012 but got a divorce two years later in 2014.
Kate and Jamie got married in a ceremony across the street at their neighbor’s house in 2017.
For more updates, stay tuned to Frostsnow.