Scribes hired for drug trafficking dramedy.

Deadline has word that Jay and Mark Duplass (‘Jeff, Who Lives At Home,’ ‘Cyrus,’ ‘Baghead’) have been hired by Warner Bros. to adapt Tony D’Souza’s novel ‘Mule.’

The 2011 novel centers on a young couple’s unexpected entry into the world of “muling” marijuana cross-country to scratch out a living during the economic downturn and an unexpected pregnancy.

‘Mule’ is being developed as a directing gig for Todd Philips (‘The Hangover’). Phillips is attached to produce, via his Green Hat Films banner.