In their new World War II period piece Allied, directed by Robert Zemeckis and written by Steven Knight of Peaky Blinders renown, Marion Cotillard and Brad Pitt play two spies — one French, one Canadian — who join forces and then, because it's Hollywood, fall in love. After the successful completion of their mission, the film flashes forward to domestic bliss once the two have settled down in London — until Pitt's character learns Cotillard might not be who she says she is. Cue more espionage, more intrigue — all the trappings of a film tailor-made for holiday distraction.

Though Cotillard and Pitt's new film doesn't premiere for wider audiences till Wednesday, just before Thanksgiving, all eyes have still been on them as they premiere it around the world — and especially in Cotillard's hometown. Straight on the heels of last week's Dior and Guggenheim International Gala where she wore a swingy green velvet Maria Grazia Chiuri design, Cotillard arrived on the Paris red carpet for Allied in yet another Dior design.

Marion Cotillard in Dior at the premiere of Allied in Paris, France, November 2016.

Getty Images For Paramount

Who: Marion Cotillard.

When: Sunday, November 20.

Where: The premiere of her new film Allied (Alliés, in French) with Brad Pitt in Paris, France.

What: A one-shouldered red silk gown by Dior with delicate drop earrings.

Why: We're still not convinced she's pregnant, based on her red carpet looks over the past few months. Here, a red silk column gown subtly disguises her baby bump, its single long bat-wing sleeve and one-shouldered silhouette drawing attention upwards. She styles it with a simple smoky eye, neutral lip, and unfussy, natural hair falling around her shoulders — an example of the vaguely old-Hollywood glamour she exudes so casually, and a perfect look for her '40s-set period piece. Last week, we sang Amy Adams's praises for her red Tom Ford column dress at the premiere of Nocturnal Animals; Cotillard's dress might be a little less slinky (a little less Tom Ford), but together they're making it clear fire red is the red carpet color of the moment.

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