In a pre-Cannes move, Patrick Wilson, Jessica Biel, Imogen Poots and Toby Jones have come on board an untitled murder mystery based on Patricia Highsmith’s novel “The Blunderer.”

Sierra/Affinity will handle international sales buyers for the first time at Cannes, and CAA is overseeing the sale of the project domestically. The film is slated to begin production later this year.

Andy Goddard, who directed the third season finale of “Downton Abbey,” will direct the thriller. He’s been attached to the project — formerly known as “The Blunderer” — since early last year.

Killer Films’ Christine Vachon and David Hinojosa, along with Ted Hope and Sierra Pictures, will finance the film.

Susan Boyd adapted the 1954 novel, which Highsmith wrote in between “Strangers on a Train” and “The Talented Mr. Ripley.”

Highsmith’s novel is centered on a successful and handsome man (Wilson) who seems to have it all until the day the body of his wife — played by Biel — is found at the bottom of a cliff. Under the intense scrutiny of the investigation, he commits one mistake after another until he finds his perfect life derailed.

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