Sam Claflin and Gemma Arterton's Chemistry Is Unstoppable in This Exclusive Sneak Peek of 'Their Finest'

If your interests include period pieces, heart-warming romantic comedies, and Sam Claflin in the world's most amazing mustache, please go ahead and direct your attention to Their Finest.

The movie (which hits theaters April 7) is romantic comedy done right, and takes place in 1940s London—where a group of filmmakers are trying to make a British propaganda movie to lift the public's spirits. (Spoiler alert: your spirits will also likely be lifted.)

MarieClaire.com got our hands on a sneak peek featuring Claflin as a mustache'd scriptwriter trying to convince fellow wordsmith Catrin Cole (played by Gemma Arterton) to come on board the project for a hint of "girl talk." Sure, she's married—but the tension between them is undeniable. Watch for yourself.

Also, did we mention Bill Nighy is in the film? How can you possibly go wrong.

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