On The Late Show with Stephen Colbert Thursday, Mindy Kaling revealed that she welcomed her second child, a baby boy, in September.

The 41-year-old actress said, “I’m telling it for the first time now, it feels so strange. But I gave birth to a baby boy on September 3.”

Colbert said, “No one even knew you were pregnant!” Kaling said, “I know! I know! This is news to a lot of people. It’s true.”

Upon asking her son’s name, Kaling revealed that “his name is Spencer.”

Kaling also has 2½-year-old daughter Katherine. Similarly, Katherine’s birth was also a bit of a surprise to fans.

In June 2019, The Mindy Project actress told Glamour, “I always knew I wanted to be a mom, but I would have put it off and put it off. I’m happy that it happened when it did.”

“I would have put it off indefinitely,” she added. “I’ve seen firsthand the heartbreak of women who have waited to get pregnant [and then it doesn’t happen]. For me, my relationship with my mother was such an integral part of my life. Thinking back on our relationship is still such a huge source of my happiness day-to-day, so I’m so grateful for having Katherine.”

In 2017, Kaling said she is inspired by her mother when it comes to parenting style.

At the time, she said, “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. 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 the open-mindedness, I’d be so happy.”

“My child [Katherine] was supposed to start preschool this year. And we were so excited. She was going to go to this school that I love,” Kaling recently told PEOPLE. “Now I have the writers’ rooms filling up for two of my shows on Zoom, while I’m also leading my child through her day-long preschool,” she continued. “I’m so lucky because I have help. I’m at home all the time, and I don’t want to eat takeout every single night. I have to be a full-time single parent who has to make the money for this household. So it’s been challenging.”