InterviewsTV Derek Cianfrance on Special Collaboration with Mark Ruffalo in ‘I Know This Much Is True’ โ Exclusive Interview by Ben Rolph May 15, 2020 || 10:23 am by Ben Rolph May 15, 2020 || 10:23 am Renowned indie filmmaker Derek Cianfrance opens up on his collaboration with Mark Ruffalo on the HBO mini-series, ‘I Know This Much Is True’. FacebookTwitterRedditEmail