Ruffalo previously starred in HBO miniseries The Normal Heart.
Mark Ruffalo is heading back to the small screen for a new project from Derek Cianfrance, the director of Blue Jasmine and The Place Beyond the Pines.
His next screen appearance will be as Bruce Banner/The Hulk in Marvel sequel Thor: Ragnarok from filmmaker Taika Waititi.
Cianfrance – whose most recent film The Light Between Oceans was met with mixed critical response – is writing and directing what HBO will hope will be yet another big Emmy award-winner.