Popsugar Entertainment This Is Us How Old Is the Cast of This Is Us? Age Investigation: How Old Are the This Is Us Characters and Actors? November 21, 2017 by Ryan Roschke View On One Page Photo 5 of 6 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 5 Randall Pearson (Sterling K. Brown) Brown's Age: 41 Randall's Age: 36, just like his siblings Previous Next Start Slideshow Milo VentimigliaMandy MooreThis Is UsTV