Popsugar Pets Cats See Mark Ruffalo's Cat Pictures on Instagram Mark Ruffalo's Cats Are All Up in His Instagram, and I've Never Related More to a Celebrity 28 April 2021 by Maggie Panos View On One Page Photo 1 of 15 ADVERTISEMENT () Start Slideshow View this post on Instagram A post shared by Mark Ruffalo (@markruffalo) Share This Link Copy ← Use Arrow Keys → 1 Previous Next Start Slideshow CatsCelebrity InstagramsMark Ruffalo