When it comes to talent, age really is just a number. Kiernan Shipka, 13, landed her role as Sally on Mad Men when she was 7. Now she’s walking red carpets in Oscar de la Renta. Violinist Claudius Agrippa, 13, was discovered playing Bach on the subway by New York Concerti Sinfonietta founder and artistic director Julie Jordan. Agrippa appeared in a Dior Homme video by Bruce Weber and is currently enrolled in the Juilliard School’s MAP program. And Romeo Beckham, 10, offspring of David and Victoria, stole the spotlight in Mario Testino’s spring 2013 campaign for Burberry. At this rate, Lena Dunham is starting to look practically geriatric.—V.L.