Mark Ruffalo plays twin brothers Thomas (left) and Dominick Birdsey in the HBO six-part series I Know This Much is True that tells a heartbreaking tale of family trauma. Photo: HBO Mark Ruffalo plays twin brothers Thomas (left) and Dominick Birdsey in the HBO six-part series I Know This Much is True that tells a heartbreaking tale of family trauma. Photo: HBO
Mark Ruffalo plays twin brothers Thomas (left) and Dominick Birdsey in the HBO six-part series I Know This Much is True that tells a heartbreaking tale of family trauma. Photo: HBO

I Know This Much Is True: how Mark Ruffalo played two very different twins in HBO drama and why he was so keen to adapt the book to screens

  • Ruffalo plays identical twin brothers – one suffering from paranoid schizophrenia – in gruelling duel role that required significant weight change
  • Director Derek Cianfrance deliberately worked Ruffalo up by making him do push-ups before takes, and encouraging his negativity towards a supporting actor

Topic |   Streaming video and TV
Mark Ruffalo plays twin brothers Thomas (left) and Dominick Birdsey in the HBO six-part series I Know This Much is True that tells a heartbreaking tale of family trauma. Photo: HBO Mark Ruffalo plays twin brothers Thomas (left) and Dominick Birdsey in the HBO six-part series I Know This Much is True that tells a heartbreaking tale of family trauma. Photo: HBO
Mark Ruffalo plays twin brothers Thomas (left) and Dominick Birdsey in the HBO six-part series I Know This Much is True that tells a heartbreaking tale of family trauma. Photo: HBO
READ FULL ARTICLE