Edgar Wright talks music doc 'The Sparks Brothers' and why he's 'a frustrated band member'

The art-pop/glam-rock band Sparks has constantly been evolving over the last 50-plus years, and during that time they’ve never quite had a publicist like Edgar Wright.

The British filmmaker of “Shaun of the Dead" and “Scott Pilgrim vs. the World” directs his debut documentary with “The Sparks Brothers” (in theaters Friday), a star-studded retrospective that tracks the influential albeit underrated career of siblings Ron and Russell Mael and also questions the idea of what exactly defines musical success.