Marion Cotillard's Partner Guillaume Canet Calls Brad Pitt Cheating Rumors 'Stupid and Unfounded'

Marion Cotillard's partner, Guillaume Canet, is breaking his silence.

The 42-year-old actor and director took to social media on Friday to speak out against rumors that Cotillard was involved in an affair with Brad Pitt.

WATCH: Brad Pitt and Angelina Jolie's Split Has Nothing to Do With Marion Cotillard

"I don't usually make it a habit to comment on rumors made about us," Canet wrote in French on Instagram, alongside a picture of a "Danger" road sign.

"I also don't usually talk about my private life until now. I have always protected attentively ... But the fury of the tabloids, the venal stupidity of some people calling themselves journalists, the haters who feel braver behind a keyboard, drive me to speak of the pride, love, respect and admiration I have for Marion staying as strong and intelligent in the face all these stupid and unfounded accusations," he added.

"I think we're all living with much more important things at this moment and now it's time to move on and raise the bar a bit," Canet continued. "Even if there's so much work for some, I want to be positive. And as Marion said so well I hope you get better and aspire to something in your life than constantly sending sh*t!"

WATCH: Brad Pitt Speaks Out on Angelina Jolie Divorce -- 'I Am Very Saddened By This'

On Wednesday, Cotillard, who stars opposite Pitt in the upcoming film Allied, also addressed the cheating rumors.

"This is going to be my first and only reaction to the whirlwind news that broke 24 hours ago and that I was swept into," Cotillard began her lengthy post. "I am not used to commenting on things like this nor taking them seriously 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," she said of Canet and their 5-year-old son, Marcel. "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. And to all the media and the haters who are quick to pass judgement, I sincerely wish you a swift recovery," she continued.

"Finally, I do very much wish that Angelina and Brad, both who I deeply respect, will find peace in this very tumultuous moment," she concluded the essay, signing the post: "With all my love, Marion."

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. I am not used to commenting on things like this nor taking them seriously 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. And to all the media and the haters who are quick to pass judgment, I sincerely wish you a swift recovery. Finally, I do very much wish that Angelina and Brad, both whom I deeply respect, will find peace in this very tumultuous moment. With all my love Marion Ceci sera la première et seule réaction que j'aurai concernant la déferlante inouïe qui à commencé il y a de ça 24 heures et à laquelle je suis mêlée malgré moi. Je n'ai pas pour habitude de commenter ni de prendre au sérieux le tas d'absurdités déversées à mon sujet mais la situation prenant une telle tournure et affectant des gens que j'aime, je me dois de m'exprimer. Pour commencer, j'ai rencontré il y a quelques années l'homme de ma vie , le père de notre fils et du bébé que nous attendons aujourd'hui. Il est mon amour, mon meilleur ami et le seul homme dont j'ai besoin. Ensuite, à ceux qui me prétendent dévastée, je vais très bien merci. Ce genre d'inventions aberrantes ne m'affecte en aucun cas. Et pour finir, à la "presse", à tous les haters, trolls et consorts qui ont le jugement si rapide je vous souhaite sincèrement... un prompt rétablissement. Ceci dit et un peu plus sérieusement, je souhaite à Angelina et Brad, deux personnes pour qui j'ai un profond respect, de trouver la paix dans ce moment tumultueux. Avec tout mon amour. Marion

A photo posted by @marioncotillard on Sep 21, 2016 at 4:43pm PDT

EXCLUSIVE: Angelina Jolie & Brad Pitt Divorce a 'Long Time Coming' -- Here's What Went Wrong

The New York Post reported on Tuesday, shortly after news of Pitt and Angelina Jolie's divorce broke, that Jolie had filed for divorce after she hired a private eye and learned that Pitt was having an affair with Cotillard.

Sources told ET, however, that these reports were simply "not true."

See more on the split in the video below.

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