Ad Age’s annual 40 Under 40 list recognizes the up-and-comers shaping the marketing, media and agency industries. All of our honorees stand out because their careers are white hot, including some who trace their passion for the job to childhood. Georgina Gooley, the co-founder of women’s razor brand Billie, acted in commercials as a youngster. Gary Coichy, founder and head of partnership at Pod Digital Media, a podcasting agency, got interested in advertising by listening to radio ads when he was a boy.