The duo join Emmanuelle Beart in the story of a couple searching for their child who disappeared after the 2004 tsunami. Michael Gentile's The Film is producing the $5.5m Vinyan in association with France's BackUp Films.
The UK's Film4 co-developed the project to shoot in Thailand. Du Welz will re-team with award-winning cinematographer Benoit Debie for Vinyan.
Gentile will also produce du Welz's next feature, Coffin Island to shoot in late 2008.