Popsugar Entertainment This Is Us This Is Us Season 3 Cast Here Are All the New and Returning Stars For This Is Us Season 3 24 August 2018 by Kelsie Gibson View On One Page Photo 20 of 22 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 20 Michael Angarano as Nicky The I'm Dying Up Here actor has been cast as Jack's younger brother, Nicky. Previous Next Start Slideshow This Is UsTV