Open this photo in gallery: Daniel Bruhl and Théodore Pellerin star in Becoming Karl Lagerfeld. The new Disney+ offering is the third recent, splashy miniseries to mine the grime beneath the glamour of famous designers’ lives,Caroline Dubois, Jour Premier/Disney + Théodore Pellerin, 27, the most exciting Canadian actor to come along in I can’t think when, has a peach of a role in the new Disney+ miniseries Becoming Karl Lagerfeld, and he makes the most of every mouthful. (It premiered June 7.) Paris, 1972. Lagerfeld (Daniel Bruhl, Good Bye, Lenin!, Rush), 38, is a non-smoking, non-drinking, non-drugging workhorse who lives...