Eleanor Tomlinson and Keira Knightley kissing.

Keira Knightley Can't Stop Making Out With a Married Woman in Colette Trailer

Keira Knightley has officially hit her peak of proving herself a master of costume dramas—especially of the romantic sort—as the titular star in the new trailer for the far from stuffy literary biopic Colette, directed by Still Alice's Wash Westmoreland, which hits theaters in the U.S. on September 21. The first trailer, which came out in July, kicked off with Knightley reassuring the friends of her older flirt of a husband, played by a nearly unrecognizable, mustachioed Dominic West—who's lately been dabbling in the period pieces himself, landing the starring role of Jean Valjean in an upcoming Les Misérables miniseries—that his "wild days have just begun," which couldn't be clearer in the latest one, which packs in three steamy make-out sessions within two and a half minutes.

Rather than her husband, who's named Henry Gauthier-Villars but uses simply "Willy" as his nom de plume, or the charming young gentleman he suspects, though, they feature Knightley kissing the latter's wife, played by the 26-year-old British actress Eleanor Tomlinson.

Dominic West and Keira Knightley in a still from Colette.

Courtesy of Lionsgate

From there, C only lets even further loose on belle epoque France, angered by Willy's having convinced her to ghostwrite what turns out to be his first-ever novel, which flies off the shelves—largely thanks to its popularity among young women—and then becoming determined to continue taking credit (and cash) for her work, which he initially criticized as "too feminine." (At least on one occasion, he locks her in a room and orders her to write.)

Colette, of course, is too good for this, and she knows it, so she sticks to following her own rules. That includes not just striking up an affair but abandoning her former "country girl" Sidonie-Gabrielle Colette self—and her interest in men—for her own brazen mononym, chopping off her long braids into a chic, Coco Chanel–like bob. While debuting her new go-to outfit, a black suit complete with a tie, she even smiles at her husband for the first time in ages—at least, in response to his denial to publish anything whatsoever featuring her name, before she throws a hefty stack of papers at his face.

Related: See Keira Knightley's Style Evolution As the Ultimate It-Brit