Olivia Munn and John Mulaney secretly welcome baby before Thanksgiving

Olivia Munn and John Mulaney are first-time parents, secretly welcoming the arrival of a baby boy last month, the day before Thanksgiving, TMZ is reporting.

Munn, 41, gave birth on Nov. 24 in Los Angeles, TMZ added. The arrival may be sooner than some outlets expected, with some predicting the baby would arrive in December, but Munn and Mulaney had been vague about the birth date, just as they had been vague about the timeline of their romance.

The comedian officially announced that he and Munn were dating and that they were expecting a baby, during a September appearance on “Late Night With Seth Meyers.”

Mulaney talked about how the romance blossomed “in the spring,” a vague time reference that may not line up with the baby’s birth on Nov. 24, unless the baby was born early. Mulaney also described his rollercoaster year, during which he also finished his second stint in rehab and ended his seven-year marriage to artist Anna Marie Tendler.

“She held my hand through that (latest post-rehab) hell, and … we are having a baby together,” a giddy Mulaney said about Munn. “We’re both really, really happy.”

Page Six reported last month Mulaney was eager to “speed up” his divorce from Tendler, as Munn prepares to give birth.

“John wants to speed things up and get the divorce done,” a source told Page Six about Mulaney hiring powerhouse John Teitler, the same attorney who represented Matt Lauer’s ex-wife, Annette Roque.