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 2 of 22 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 2 Mandy Moore as Rebecca Moore will be back as Rebecca next season. Previous Next Start Slideshow This Is UsTV