Hero Fiennes-Tiffin is making waves due to his appearance in After, a film based on a series of novels that began life as One Direction fan fiction. It's basically Fifty Shades of Grey for the under 30s, and Hero is essentially playing Harry Styles, so needless to say he's become something of a heartthrob as a result. If the name sounds familiar, that's because Hero is part of that Fiennes family: actors Ralph and Joseph are his uncles, his mother is filmmaker Martha Fiennes. Before After, Hero had small roles in a number of films and TV shows, including Harry Potter and the Half Blood Prince (as young uncle Voldemort, natch). After After? Well, the sequel is already in development, and with five books and over one million words available as source material, there could be a lot more to come.