Two Days, One Night (French: Deux jours, une nuit) is a 2014 drama film written and directed by the Dardenne brothers, starring Marion Cotillard and Fabrizio Rongione, with Christelle Cornil, Olivier Gourmet and Catherine Salée in supporting roles.

In Seraing, an industrial town near Liège, Belgium, young wife and mother Sandra prepares to return to work at Solwal, a small solar panel factory, after a medical leave of absence for depression.

During her absence, Mr. Dumont, the manager of Solwal, realizes her colleagues are able to cover her shifts by working slightly longer hours and asks them to choose between retaining Sandra's position or receiving a €1,000 bonus.

Pushed by Juliette and Manu, Sandra reluctantly agrees to talk to each of the coworkers who voted against her over the course of the weekend and attempt to persuade seven of them to reject the bonus.

Her resolve to continue wavers when she is met with coldness, such as when a coworker she considered a friend pretends not to be home, or anger, such as when her visit prompts an altercation between a son and father, but she is heartened by the few who support her and say they will change their vote, such as Timur, who breaks down in tears and says he is ashamed of himself, as Sandra covered for him when he broke a panel on his first day.

On Sunday afternoon, Sandra discovers that Jean-Marc has been calling her coworkers to convince them not to change their votes, as he is against her coming back because of her depression.

On 25 February 2013, The Film Stage announced that Marion Cotillard would star in the Dardenne brothers' next film, Two Days, One Night, and that Fabrizio Rongione (who had previously worked with the Dardenne brothers on Rosetta (1999), L'Enfant (2005), Lorna's Silence (2008), and The Kid with a Bike (2011)) would have a supporting role as the husband of Cotillard's character.

"[12] One of the Dardenne brothers' first requests for Cotillard was for her to lose her French Parisian accent, in order for her character to sound like an authentic Belgian.

[14] The brothers have said they were won over immediately,[12] with Luc Dardenne calling their first encounter with Cotillard "a cinematic love at first sight",[14] and saying that, "Driving back to Liège, we didn't stop talking about her: her face, her look..."[12] Initially, the Dardenne brothers had a different project in mind in which Cotillard would play a doctor,[15] but that script did not come together because they had writer's block, so they decided to write a different film for her,[14] which was a project they had originally begun about ten years earlier before setting it aside.

[12] The script was based on a story the Dardenne brothers read in a sociology book about a worker at Peugeot in France in 1998, who was fired after his boss incited his team to vote for his dismissal because he was preventing them from getting bigger bonuses.

[14][16] Luc Dardenne said he and his brother were also thinking of Sidney Lumet's 1957 courtroom drama film 12 Angry Men, "because it's a process of going to see people to try and change their minds".

[34] On the film review aggregator website Rotten Tomatoes, 97% of 185 critics' reviews of the film are positive, with an average rating of 8.4/10; the site's "critics consensus" reads: "Another profoundly affecting work from the Dardenne brothers, Two Days, One Night delivers its timely message with honesty and clear-eyed compassion.

[40] Nicholas Barber of the BBC gave the film four stars out of five, praising Cotillard's performance by saying that "she conveys a tremendous amount with the smallest, quietest gestures.

When you see the fierce, tearful grin on her face after one successful encounter, and the sleepwalking shuffle she adopts when her depression threatens to engulf her, it’s plain that she is one of the finest cinema actors we have.

"[10] Emma Dibdin of Digital Spy also gave the film four stars out of five, calling Cotillard "fascinating to watch", and writing: "The physical sluggishness and emotional numbing of depression have seldom been better portrayed on screen, and yet Two Days One Night still emerges as a psychologically delving and quietly uplifting modern-day morality play.

"[41] David Sims of The Atlantic wrote that Cotillard gives "a career-best performance that has run the table at critics' awards this year.