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

The 36-year-old actress and the Saturday Night Live star have welcomed their first child together, after Scarlett — who is also mother to six-year-old Rose, whom she has with her ex-husband Romain Dauriac — gave birth “recently”.

Sharing the news on Instagram on Wednesday (Aug 18), Colin, 39, wrote, “Ok ok we had a baby. His name is Cosmo. We love him very much.”

The news comes just days after Colin, who married the Black Widow actress in October, confirmed that his wife was pregnant during a stand-up performance at a theatre in Connecticut.

He told the audience: “We’re having a baby, it’s exciting.”

Scarlett’s pregnancy was first reported last month, when sources said she was due “soon”.

One insider said: “Scarlett is actually due soon, I know she and Colin are thrilled.”

Another added: “Scarlett is pregnant but has been keeping it very quiet. She has been keeping a very low profile.”

Scarlett had sparked speculation she was pregnant again for weeks before the sources spoke out, as she hadn't been involved in many in-person events to promote Black Widow.

Instead, she made virtual appearances, such as a Zoom interview with Tonight Show host Jimmy Fallon in June, on which she was only shown from the shoulders up.

A separate insider claimed: “She hasn’t been doing many interviews or events to promote Black Widow which is surprising since it is a huge Marvel/Disney release and she is both the star and an executive producer.

And local residents in The Hamptons admitted they hadn’t seen much of the Avengers star recently, even though she and Colin are usually regular visitors to their home in Montauk.

A source said: “Scarlett usually spends a lot of the summer out in Amagansett and Montauk, and you’d often see her walking her dogs on the beach or getting coffee. But this summer it seems like she is deliberately trying to keep a low profile.” — BANG SHOWBIZ

Photo: TPG News/Click Photos