She's currently expecting her second child with husband Guillaume Canet.
And Marion Cotillard proudly displayed her blossoming baby bump in an embellished black gown at the screening for It’s Only the End of the World at BFI Film Festival in London on Friday.
But far from being the only radiant mother-to-be on the red carpet, the 41-year-old French actress was also joined by Bond girl Lea Seydoux, who is expecting her first child.
Proving that their baby bumps didn't come in the way of their great style, the pair stormed the red carpet in their glittering gowns as they promoted their new film
Marion looked positively ravishing in a glitzy black gown with a halter neckline that showed off her shoulders.
Cinching in just above her bump, the dress flared out to ankle length, exposing a pair of patent black court shoes as she teetered into the Leicester Square Odeon.
Meanwhile, Lea looked every inch as chic as her co-star in a cobalt blue gown that complemented her glowing complexion.
Featuring a glittering cape and matching asymmetric hemline, the garment flashed a glimpse of her pregnancy curves whilst remaining demure.
Wearing her golden locks loose and tousled, the Spectre star framed her flawless features, which were accentuated with a neutral make-up palette.
It's Only the End of the World is a 2016 Canadian-French drama written, edited and directed by Xavier Dolan.
In the film, Lea plays Suzanne and Marion is Catherine, while Gaspard Ulliel plays Louis, a terminally ill writer, who returns home after a long absence to tell his family that he is dying.
It is also stars French actor Gaspard Ulliel, Nathalie Baye and veteran screen star Vincent Cassel.
The movie is based on the play Juste la fin du monde by Jean-Luc Lagarce, but was named by Variety as 'the most disappointing film at Cannes'.
However, The Guardian gave it four stars saying 'The claustrophobia of family has rarely been so well-wrought as in the latest highly stylised – and highly polarising – drama by the French-Canadian enfant terrible'.
It's Only the End of the World is slated for release in the UK on April 17.
Despite being pregnant, Marion and Lea have not let their burgeoning baby bumps slow them down and have continued to promote the drama at premieres and events.
Lea - who shot to fame playing Madeleine Swann in Spectre - announced her pregnancy last month as she displayed her baby bump at Toronto Film Festival.
It is her first child with boyfriend Andre Meyer.
Marion announced her pregnancy under slightly less desirable circumstances, after she was dragged into the news surrounding the break-up of Angelina Jolie and Brad Pitt.
Following rumours that she had an affair with Brad whilst working with him on Allied, the Oscar-winner took to Instagram to clear up the rumours.
In a lengthy post, she wrote: 'This is going to be my first and only reaction to the whirlwind news that broke 24 hours ago and that I was swept up into.'
She continued: 'I am not used to commenting on things like this nor taking them seriously,' she continued, 'but as this situation is spiraling and affecting people I love, I have to speak up.
'Firstly, many years ago, I met the man of my life, father of our son and of the baby we are expecting. He is my love, my best friend, the only one that I need.'
'Secondly to those who have indicated that I am devastated, I am very well thank you. This crafted conversation isn't distressing.'