Popsugar Celebrity This Is Us How Old Is Mandy Moore? Mandy Moore Is the Perfect Age to Play This Is Us's Rebecca in Any Era 3 October 2018 by Sabienna Bowman View On One Page Photo 1 of 12 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 2000 Previous Next Start Slideshow This Is UsCelebrity FactsMandy MooreTV