HBO Limited Series I KNOW THIS MUCH IS TRUE Debut Moves To Sunday, May 10

HBO Limited Series I KNOW THIS MUCH IS TRUE Debut Moves To Sunday, May 10 The six-part limited series, I KNOW THIS MUCH IS TRUE, will now debut SUNDAY, MAY 10. The program was originally scheduled to debut Monday, April 27. Starring Mark Ruffalo, from writer and director Derek Cianfrance, I KNOW THIS MUCH IS TRUE stars Ruffalo as identical twin brothers Dominick and Thomas Birdsey in a family saga that follows their parallel lives in an epic story of betrayal, sacrifice, and forgiveness.