Hollywood star Scarlett Johansson has married her fiancé Colin Jost in a low-key ceremony, it has been announced.

The wedding took place at the weekend, said Meals on Wheels, a US-based charity for elderly people.

The charity said Johannson and Jost had supported their work with vulnerable people during the Covid-19 pandemic.

The ceremony was "intimate... with their immediate family and love ones, following Covid-19 safety precautions", Meals on Wheels wrote on Instagram.

"Their wedding wish is to help make a difference for vulnerable older adults during this difficult time," the post added, before asking fans to donate to the charity.

We’re thrilled to break the news that Scarlett Johansson and Colin Jost were married over the weekend! Their wedding wish is to help make a difference for #MealsOnWheels. You can donate here to celebrate the happy couple: https://t.co/JgM2Xxtm2H https://t.co/cuqI3Zj1Ow

— Meals on Wheels (@_MealsOnWheels) October 29, 2020

A representative for Johansson confirmed the news.

According to entertainment website TMZ, the couple were married in Palisades, New York.

Johansson started dating Jost, a writer and comedian on the sketch show Saturday Night Live, in 2017, after she made a guest appearance in the show's season finale.

The couple announced their engagement in May 2019.

Johansson is one of the highest-paid actresses in the world - thanks largely to her recurring role as the Black Widow in the Marvel Cinematic Universe.