She gave birth to her first child at the beginning of September.

And Scarlett Johansson revealed that she has already managed to return to her post-pregnancy shape as she attended The Theory Of Everything private screening on Monday night.

The stunning actress showed off her new mother glow as she posed alongside Eddie Redmayne, Rufus Wainwright and Arianna Huffington at the low-key event in New York.

Back in shape: Scarlett Johansson revealed that she has already managed to return to her post-pregnancy figure as she attended The Theory Of Everything private screening on Monday night

The 29-year-old looked effortlessly chic in a monochrome patterned mini dress which she temead with matching heels that added a pop of colour thanks to the orange soles.

The film’s star, Eddie Redmayne, looked dapper in a white shirt and blue trousers as he happily posed with the Hollywood starlet.

New mother glow: The stunning actress – who gave birth in September – showed off her new mother glow as she posed alongside Eddie Redmayne at the low-key event in New York

Sharing laughs: The 29-year-old looked effortlessly chic in a monochrome patterned mini dress as she chatted with the British actor

On September 4, a representative for Scarlett confirmed on September 4 that the happy couple had welcomed their daughter, Rose, into the world.

The loved-up pair, who started dating in 2012, sparked rumours they were expecting a child together in March this year, just three months after Scarlett revealed that she was keen to start a family.

She said at the time: ‘I would like to have my own family, that would be nice.

In good company: The actress and Eddie also posed alongside The Huffington Post’s Arianna Huffington

They say it’s never the right time and I am sure that’s true, but I think you have to plan it like anything else.

‘At some point it is something I look forward to.’

Scarlett and Romain, 31, got engaged in August 2013, but the ‘Captain America: The Winter Soldier’ star doesn’t want to ‘rush’ tying the knot as ‘being engaged is an exciting time to enjoy and to really savour.’

This will be Scarlett’s second time down the aisle as she was previously married to Ryan Reynolds from 2008 until 2011.

Ryan has since wed Blake Lively, who earlier this week announced her pregnancy.

Dazzling: She let her natural beauty shine through with natural looking make-up and drew attention to her wide smile with clear lip gloss

Low-key: Actor Rufus Wainwright also joined the starlet at the private screening