I know he's presumed to be Next Big Thing, mostly because of (a) his wimpy, weepy dad performance in Aftersun, (b) his Stanley Kowalski on the British stage earlier this year, (c) his having been tapped to step into Richard Linklater's adaptation of Merrily We Roll Along, and (d) his forthcoming starring role as Lucius, the son of Connie Nielsen's Lucilla, in Ridley Scott's Gladiator sequel.