43 aliases, 4 kids, 89 phone lines. Among his associates are members of the Mafia, CIA, IRA and MI6. Marijuana connoisseur, school teacher, money launderer, gentleman, fugitive and spy; raconteur, travel agent, writer, philosopher of science, rock promoter, public speaker, board game appreciator and the biggest dope smuggler on the planet. He has his own website which is very ganja-friendly, and he wrote a sequel to the autobiographical book this film is based on called Senor Nice. He's also written Dope Stories, and the upcoming Tripping. He has a show on YouTube, and in the words of Rhys Ifans, "He's a folk hero in the UK, but in Wales, he's a hero."
So how do you turn a book about a (folk) hero into a film? Director Bernard Rose (Candyman, Immortal Beloved, ivansxtc) has attempted to do it with a mixture of different styles, archival stock footage, and performances from Rhys Ifans and Chloe Sevigny. Ifans might not be the first name that jumps to mind when you think historical figure, but just watch that YouTube footage above and you'll see why they went with Ifans. It would be either down to him or Geoffrey Rush. Since Ifans is Welsh, just like Marks, and had a history with the man, that casting made a lot more sense.