Rising Brit thesp Douglas Booth and Billy Crudup are set to star in “Life at These Speeds,” the first film executive produced by Sam Rockwell.

Leif Tilden, who directed Rockwell in the award-winning short “BigLove,”will direct from a script by Marc Novak, based on the novel by Jeremy Jackson.

Described by Tilden as a “moving film about hope and forgiveness,” story follows a rural teenager (Booth) who loses his best friends in a tragic accident and channels his survivor’s guilt into an addiction to running, becoming a world-class distance runner in the process.

Crudup, who once mined similar sports material as track star Steve Prefontaine in “Without Limits,” will co-star as Booth’s coach and confidante.

Cinema Revival prexy Scott William Alvarez, Peter Holden and Mississippi-based F.X. Vitolo will produce the pic, which is skedded to start production in late March in Jackson, Mississippi.

“I’ve been a big supporter of Leif — and of “Life at These Speeds” since its inception — and I’m very excited that Douglas and Billy have joined us on the project,” said Rockwell.

“Sometimes a script comes along that really makes you sit up and pay attention,” said Booth. “Life at These Speeds has an emotional intensity that really kicked me in the guts. I love the challenge of playing characters forced on life-changing emotional journeys. To work on a project with Billy Crudup and Sam Rockwell is just a dream come true.”

Booth is coming off a well-reviewed turn as Pip in the BBC miniseries “Great Expectations,” which airs stateside in April on PBS. Thesp will play the title role opposite Hailee Steinfeld in Carlo Carlei’s upcoming adaptation of “Romeo and Juliet,” and will soon be seen playing Miley Cyrus’ love interest in “LOL.”

Crudup, who recently played J. Edgar Hoover in “Public Enemies” and Dr. Manhattan in “Watchmen,” stars in last year’s Sundance entry “Thin Ice,” as well as 20th Century Fox’s Ben Stiller comedy “Neighborhood Watch.”

A veteran location manager, Tilden also played Donatello in the first two “Teenage Mutant Ninja Turtle” movies.

Booth is repped by UTA and the Curtis Brown Group in the U.K., while CAA and Brillstein Entertainment rep Crudup. Rockwell is repped by Gersh.