Jost announced the news on its instagram Wednesday.
“Well, we had a baby. His name is Cosmo. We love him so much,” Jost wrote.
No information was shared about when the baby was born. “Privacy would be greatly appreciated,” he said.
This is the second child for Johansson, who has 7-year-old daughter Rose Dorothy with ex-husband Romain Dauriac.
The actress and “SNL” star got engaged in 2019 and married in 2020.
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