'It was a real challenge for me,' Chalamet said at the Venice International Film Festival, where the film is having its world premiere. 'It was terrifying at the same time but I had an amazing time.''It was terrifying at the same time but I had an amazing time,' Chalamet said at the Venice International Film Festival, where the film is having its world premiere. (Photo by Joel C Ryan/Invision/AP)The 23-year-old has been nominated for an Oscar, but he's never done stunts, worked with swords or played a role quite like this. And not many people his age have. (Photo by Joel C Ryan/Invision/AP)The King plays out of competition at Venice, and is one of three Netflix films, including The Laundromat and Marriage Story debuting at the Lido. In theaters Oct 11. (Photo by Arthur Mola/Invision/AP)The King plays out of competition at Venice, and is one of three Netflix films, including The Laundromat and Marriage Story debuting at the Lido. In theaters Oct 11. (Photo by Arthur Mola/Invision/AP)