New mum Mindy Kaling is keeping mum.

The Mindy Project star, 38, gave birth to a baby girl named Katherine Swati Kaling on December 15, and while the tot’s birth certificate was obtained by Entertainment Tonight, the identity of Katherine’s father continues to remain a mystery.

The Ocean's 8 actress refused to comment on the identity of her baby’s father throughout her pregnancy, and has continued to remain tight-lipped on the matter.

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Mysteries abound: Mindy Kaling, 38, has yet to name the father of her baby daughter after she had a baby girl last week. The comic was snapped in September in LA

Meanwhile, her daughter's middle name appears to be a tribute to her late mother who was named Swati. Mindy's mother, who was a physician, died in 2012.

Shortly after her pregnancy was revealed, sources claimed The Office actress was refusing to divulge details about the father’s identity - even to her closest friends.

'She just started telling her friends she is pregnant,' an insider told People in July. 'She is not telling anyone, not even close friends, who the father is.'

In October, the actress told Ellen she was 'having a great time' being pregnant, as she had begun to realize she took a lot of things for granted prior to her pregnancy.

'I'm very, very pregnant,' she said. 'I've had a pretty great time of it so far, but I think I took a lot for granted before this, now that I'm in my current situation. Like, sitting, I'm obsessed with sitting and even when I was standing back there I was looking at this chair and I was like, "Awww, can't wait to sit in that chair!"'

Mindy also told the talk show host she was 'having a girl' in the appearance.

Baby love: Mindy confirmed her pregnancy in September, after her Wrinkle In Time co-star Oprah spilled the news several months prior. She was snapped in LA in September

'My mom was incredibly fierce and so devoted to us': Mindy (pictured in November) said she was looking to her own mother for inspiration in her parenting style

A-listers: Mindy was snapped with Reese Witherspoon in Anaheim this past July at an expo

Mindy confirmed her pregnancy in September, after her Wrinkle In Time co-star Oprah spilled the news several months prior.

'It’s so unknown to me,' she explained to Sunday Today. 'I have a lot of control over a lot of aspects of my life, and this is one where I’m like, "OK, it’s out of my hands," which is kind of a fun feeling,' she said.

She said she was looking to her own mother for inspiration in her parenting style.

The doctor is in! She starred as OB/GYN Mindy Lahiri in her beloved series The Mindy Project

Pen to paper: An accomplished writer, Mindy has also released the memoirs Is Everyone Hanging Out Without Me? (And Other Concerns) and Why Not Me? (pictured November)

Out and about: The actress was snapped this past May at an NBC event in NYC

'My mom was incredibly fierce and so devoted to us, just loved us and really wanted us to be happy no matter what we did,' she explained.

'My career choice was not something that she was familiar with and she was just so supportive of that. And if I could give that to my child, just that open-mindedness, I'd be so happy.'

Mindy soared to stardom after starring as the bubbly Kelly Kapoor in the comedy series The Office from 2005 to 2013. She more recently starred as OB/GYN Mindy Lahiri in her beloved series The Mindy Project, of which she created. The show recently aired its finale after its sixth and final season earlier this year.

An accomplished writer, Mindy has also released the memoirs Is Everyone Hanging Out Without Me? (And Other Concerns) and Why Not Me?

Mindy has previously been romantically linked to BJ Novak and writer Benjamin Nugent.