Alex Pettyfer is set to topline “Diamond Dogs,” an English-language thriller by “Heartbreaker” director Pascal Chaumeil.It’s the first English-lingo pic produced by Quad Films, the outfit run by Nicolas Duval Adassovsky, Yann Zenou and Laurent Zeitoun behind B.O. phenomenon “The Intouchables.” Steven Chasman, whose credits include “Killer Elite” and “The Bank Job,” is a co-producer on the film, an adaptation of a novel by Alan Watt. The Nevada-set pic will star Pettyfer has a popular high school quarterback whose life is turned upside down after he accidently kills someone, a crime that his father, who is the local sherrif, is covering up. Quad is in process of casting a high-profile thesp to play the teen’s father. Pettyfer recently completed Steven Soderbergh’s comedy “Magic Mike.” Chaumeil, who’s a fan of film noir, told Variety that he was attracted to the novel because it’s a well-paced crime thriller with lots of suspense with a deep emotional component. The Gallic filmmaker will soon make his English-language debut with the HanWay-repped dramedy “A Long Way North,” which stars Pierce Brosnan, Toni Collette and Emile Hirsch. Chaumeil is wrapping “Fly Me to the Moon,” a Quad-produced action-packed adventure comedy starring Dany Boon and Diane Kruger, which Gregoire Melin’s Kinology is selling at Cannes. Pettyfer is repped by WME.