Scarlett Johansson's mother-in-law wasn't convinced by her baby name choice

In August 2021, the actress from The Marriage Story and her husband Colin Jost welcomed a boy they called Cosmo.

On The Kelly Clarkson Show on Monday, though, Scarlett revealed how Colin's mother Kerry didn't at first like the nickname.

"We just threw a bunch of letters together. No, but I just really thought it was so charming and our friends all liked it," the 37-year-old recounted of how she and Colin settled on the name Cosmo for their little boy. 

Colin's mom had a little bit of a harder time with it. 

She kept suggesting other versions of it for a while and I was like, 'No he's already here, he's out, it's past that time.'"

Yet, Scarlett noted that her eight-year-old daughter Rose, whom she shares with ex-husband Romain Dauriac, was immediately onboard with the name.

(Cosmos) is a really sweet little flower that comes in different shades of orange and yellow, that's why my daughter liked it too," she smiled.