The perceived age of an actor or actress is important, not just for the viewer's entertainment but for the overall success of a TV show or movie. Fundamentally, age is not just a number — it’s a commodity. The younger you look, the more likely you are to be successful in Hollywood.

Singer-songwriter Dean Lewis, best known for his hit “Be Alright,” released his debut studio album “A Place We Knew” on Friday. Lewis first gained recognition in his own home country of...