The 38-year-old actress exclusively revealed to ET's Katie Krause on Wednesday that she has given birth to her first child, a baby girl, with fiancé Ben Shattuck. Slate also revealed the baby's adorable moniker: Ida Lupine.
"Yeah, I'm not pregnant anymore," she joked. "The baby came out!"
During the interview, Slate shared that she and Shattuck chose Ida simply because they "loved the name," while Lupine is one of the couple's favorite flowers.
As for the surprise birth announcement? Slate says she "did that funny thing" where she announced her pregnancy "basically like four days away" from her due date. She exclusively told ET she's already loving motherhood, especially because Ida is "a sweet, happy baby," and a "good sleeper."
"I can say, without a doubt, that motherhood is for sure the most meaningful thing that has ever happened to me," she gushed. "I feel really lucky and happy."
Like many mothers who became pregnant in 2020, Slate had to wear a mask while giving birth amid the pandemic. Despite the extra precautions, the comedian told ET that it was a positive experience, and "strangely rather romantic" to see how connected she and Shattuck were in the moment.
"Being a mother is such a joy. It's so cliché but I love it," she shared, adding that she's fallen even more in love with her partner after seeing him become a dad. "He was so sweet and supportive toward me. We are already very, very close, but I guess you can get closer and closer when your love is healthy and good."
"That's something that I'm grateful for every day," she added. "That and our sweet gal!"
As ET previously reported, Slate first revealed the news that she was expecting in early December during an appearance on Late Night With Seth Meyers.
"Let me tell you, on night one of the lockdown, we had a really romantic night of being together, real sweet with my fiancé," she said at the time. "And then I did what everyone else did. I kind of hunkered down and baked a lot of bread. But I just want to say I think I might have baked too much bread or eaten too much bread. You tell me, Seth."
In addition to Slate's exciting baby news, the actress' new animated series, The Great North, premieres Sunday, Feb. 14 at 8:30 p.m. ET/PT on Fox. Preview episodes are currently available to watch on Fox and Hulu.
"The comedy of The Great North is so unique," she teased. "The voice is just so very special, and as a comedian, you're always looking for something that's surprising and not reiterative and sort of takes a new space."
"I think our show really does that," she added. "It's really warm, and I know I am looking for that in the entertainment that I watch these days. I just want something that is just going to make me feel good in a way that feels real."