E! News reports that the 38-year-old actress welcomed her baby girl, Katherine Kaling, on December 15th.
It was first reported that the actress was pregnant in July, though she still hasn't revealed who the father is.
Kaling spoke openly about her pregnancy for the first time in August, saying on NBC's Today show that she is "really excited" to become a mum.
"I'd like to be the fun mum, I know I'm gonna be the dorky mom," she added. "So if I can be kind of fun too, I think that would be nice."