Laura Dern and Grace Helbig Pitch How They'd Market the Driverless Car

The backseat driver would be the focus of their campaigns

CANNES, France—Laura Dern and Grace Helbig think whoever markets the driverless car should do something about the backseat driver. The actress and YouTube star, respectively, told the Cannes Lions audience their ideas during a talk about brands working with Hollywood stars versus digital stars on the Lumiere stage.