“While rock has long had a tradition of sibling acts, the film and art worlds, though previously featuring plenty of brothers and sisters working in different areas of the same art form, seem to have only recently hit upon the idea of consolidating the family business. But does working with your brother or sister have any effect on the artistic end product? Is sibling art or music somehow different from other collaborative efforts and, if so, is it rooted in a genetically shared talent or simply the circumstances of upbringing? – The Sunday Times (UK)