Ever since the very first episode, This Is Us has been throwing curve balls at us with different timelines and cast members. It's not everyday that you get to see a family "grow up" on screen and piece together how they became who they are. In order to pull off this emotional feat, however, the show cast multiple actors to play the show's leads at different age stages, including The Big Three (Kevin, Kate, and Randall Pearson) and most recently, Tess Pearson. While the cast may not appear on screen with their "younger selves," they definitely still have fun together behind the scenes and act like one big, happy family.
Image Source: Getty / Kevin Mazur