"She is not telling anyone, not even close friends, who the father is," the source said, adding, "She just started telling her friends she is pregnant."
The insider said that the actress is not currently dating anyone.
A source told E! News that Kaling's pregnancy was "an unexpected surprise" but that no scheduling changes will be made for the star's upcoming projects.
Kaling previously discussed pregnancy with Yahoo! Style in 2015, saying, "I think I've decided that unlike everything else in my life, I'm going to be fast and loose about kids."
"I'm going to not actively plan, but if it happens, it would happen," she added. "I'm not cavalier about who I would have a kid with. But the thing I ask every parent that I really admire, the one comment they all have is that they wish they had kids earlier."
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