If you’ve ever sat through an episode of Peaky Blinders, you might find yourself wondering how the heck Cillian Murphy didn’t destroy his lungs playing the infamous Thomas Shelby.Yup, there’s rarely a scene where the titular character isn’t puffing on a cigarette – so, what’s actually going on? Are they just destroying packets of cigarettes a la Dot Cotton actress June Brown? Well, one TikToker has shared what our fave celebs are actually smoking – and it turns out things are far more herbal.No, not that type of herb, before you get excited.Director David Ma (@davidwma) often shares the truth behind Hollywood trickery and in a video which has amassed a whopping 2.2 million likes, the film expert has revealed what stars are smoking.@davidwmaReply to @user5710632601 Today’s FilmTok lesson: Prop Cigarettes