Everybody loves Mark Ruffalo, except maybe Edward Norton (since Ruffalo swooped in and took what must be a pretty lucrative superhero gig from him), and so now HBO is getting ready to double the amount of Ruffalo that we normally get by casting him as a pair of feuding twins in a new limited series. According to The Hollywood Reporter, Mark Ruffalo is set to star opposite Mark Ruffalo in an adaptation of Wally Lamb’s I Know This Much Is True, an “epic story of betrayal, sacrifice, and forgiveness” that centers on two identical twin brothers and is “set against the backdrop of 20th century America.”