Colin Jost Reveals His Mom’s Hilarious Reaction To Newborn Son’s Name: ‘And, Now, Is It Final? Like, Did You Submit The Birth Certificate?’

Colin Jost admits his mom wasn’t thrilled about his baby boy’s name, whom he shared with Scarlett Johansson.

Jost, 39, appeared on Late Night with Seth Meyers and talked about life with his son Cosmo, whose birth he announced last month. When asked about what inspired the name choice, Jost said his mom took some time to come around to it.

RELATED: Meet the Precious Celebrity Babies Born in 2021

“My family is very supportive always. My mom, I would say, was slightly thrown by it and didn’t quite understand it. I don’t know if she thought it was kind of like a hippie thing?” he said.

“She would call us, after three or four days, she’d be like, ‘Cosmo…’ And she’d be like, ‘And, now, is it final? Like, did you submit the birth certificate?’ And we’re like, ‘Oh, yeah, we did that at the hospital,'” said Jost. “She was like ‘Oh okay, interesting. Because I was reading that there’s also a name Cosimo with an “I” so that could also be an option. Maybe you call him Cosimo, that’s his real name, but then you can call him still Cosmo.'”

But eventually, the name grew on Jost’s mom.

“So then,” he said, “she would call, and she would say, ‘I met someone — they said their uncle’s name is Cosmo, so it is okay.’ And I was like, ‘It’s locked in.'”

Last month, after it was official that the two welcomed their first baby together, Jost revealed more insight about their new family.

RELATED: Disney States Scarlett Johansson’s Lawsuit Over Black Widow’s Release Is ‘Sad And Distressing’

“Ok ok we had a baby. His name is Cosmo. We love him very much. Privacy would be greatly appreciated,” he wrote on Instagram, then joking with his SNL costar Michael Che, “For all inquiries please contact our publicist @chethinks.” He also added the hashtags: “#wegotawaywithitforalongtime” “#nokidspolicy” and “#weregoingtodisneyworld.”

A source revealed to PEOPLE at the time how Jost and Johansson, who is also mom to 7-year-old daughter Rose Dorothy, are “both so happy and madly in love with the baby.”

“They wanted this child who will fit right into their lives since they already have her daughter,” the source said. “They are an awesome couple, both talented, smart and clever. They will be the best parents. Colin is considerate and helpful in everyday life so adding one more to the mix should be fine. The baby is the best thing ever for both of them.”

About Mamas Uncut

Mamas Uncut is THE online place for moms. We cover the latest about motherhood, parenting, and entertainment as well – all with a mom-focused twist. So if you're looking for parenting advice from real parents, we have plenty of it, all for moms from moms, and also experts. Because, at the end of the day, our mission is focused solely on empowering moms and moms-to-be with the knowledge and answers they’re looking for in one safe space.

Scroll to Top