Scarlett Johansson has given birth to her first child with her husband Colin Jost. 

Johansson's rep confirmed the news to People magazine on Wednesday and then Jost posted about the birth on social media. 

"Ok ok we had a baby. His name is Cosmo. We love him very much," the "Saturday Night Live" star wrote

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Colin Jost, left, and Scarlett Johansson arrive at the premiere of "Avengers: Endgame" at the Los Angeles Convention Center on Monday, April 22, 2019. (Photo by Jordan Strauss/Invision/AP)

The 'Saturday Night Live' star and the 'Black Widow' star married in October 2020. (Photo by Jordan Strauss/Invision/AP, File)

Reps for Johansson and Jost didn't immediately return Fox News' request for comment.

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This is the "Black Widow" actress' second child. She shares her six-year-old daughter, Rose, with ex-husband Romain Dauriac. 

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Jost confirmed his wife was pregnant during a stand-up comedy show this week. "We’re having a baby," he said per Us Weekly. "It’s exciting."

The "Saturday Night Live" star and the "Avengers" star married in October 2020.