Everything is shaping up for the upcoming biopic about Isabella Blow. Phillip Treacy - the person behind the film - has already secured John Galliano to make an appearance and is trying to convince Brad Pitt to play him "but it's wishful thinking and perhaps not very likely I know," he told Vogue UK. But who will play Blow? The late editor's widower Betmar Blow is set on havin Rachel Weisz.