HBO is developing I Know This Much Is True, an eight-episode limited drama series starring and executive produced by Mark Ruffalo, from FilmNation Entertainment (Arrival), Deadline is reporting.
Like Big Little Lies, I Know This Much Is True is based on a popular book, the 1998 novel by bestselling author Wally Lamb, which was was an Oprah’s Book Club pick that year.
Written and directed by filmmaker Derek Cianfrance (Blue Valentine), I Know This Much Is True is described as an epic family saga that explores the American identity following the parallel lives of twin brothers Dominick and Thomas Birdsey throughout the latter half of the 20th century. Ruffalo will pull double duty, starring as both brothers.
Ruffalo and Lamb, who have been collaborating on a TV adaptation of the book for the past two years, executive produce with Cianfrance as well as Ben Browning & Glen Basner of indie film company FilmNation.