Alexander Skarsgård’s latest film Pillion is about a biker in a BDSM relationship. But you might have guessed that even before you bought your popcorn – if you happened to catch Skarsgård on the red carpet at premieres for the film, wearing the clothes that signal this culture: leather trousers, black boots and a slightly risqué halterneck-style shirt. If that all sounds a little out-there – although it tracks with Skarsgård’s recent style experimentations, which have also seen him wear tiny shorts and sports jacket on a talk show – it’s actually part of a wider trend on the red carpet, one where actors directly reference the film they are promoting in the outfits they’re wearing. It’s all very meta.