Popsugar Entertainment This Is Us This Is Us Season 4 Cast This Is Us Will Include a Few New Faces in Season 4 — Here's the Full Cast 19 June 2019 by Kelsie Gibson View On One Page Photo 1 of 15 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Mandy Moore as Rebecca Moore will return as the Pearson family matriarch in season four. Previous Next Start Slideshow This Is UsTV