A limited HBO series adaptation of author Wally Lamb’s best-selling novel I Know This Much Is True is heading to our screens soon.

The family saga is set to follow the parallel lives of identical twin brothers – Dominick and Thomas Birdsey – who are both played by Mark Ruffalo. Thomas is a paranoid schizophrenic, and the story will tell of Dominick’s efforts to have his brother released from an asylum.

Directed by Derek Cianfrance, who also helmed Blue Valentine and The Place Beyond the Pines, I Know This Much Is True also stars Kathryn Hahn, Melissa Leo, Juliette Lewis, Rosie O’Donnell and Imogen Poots.

Look out for I Know This Much Is True in April.