In this roundtable, Matthew Woolf hosts a conversation between Actor Mark Ruffalo and Director Derek Cianfrance and the three of them discuss Mark & Derek’s experience making the hit HBO Mini-series I Know This Much is True.

They break down many aspects of the show, including Mark & Derek’s relationship as co-creators and how that affected their individual roles, the challenges they faced and how they overcame them (including the decision to shoot on film vs. digital) and the technical process behind Mark’s portrayal of identical twins. Finally, the duo highlight the commitment it took on several people’s parts to put to achieve a believable and successful result.

The doors are opened through this conversation to the special relationship between two of the finest filmmakers of our generation.