16. Luke Youngblood - Lee Jordan
Remember Lee Jordan? He had a much more significant presence throughout all of the books, as Fred and George's best friend and the official Quidditch match commentator, but his role was pared down to the bare essentials in the films. In fact, Luke Youngblood (who plays Lee) only shows up in the first two films before being streamlined out in favor of characters more directly related to the plot. But don't shed too many tears for Youngblood -- his career has gone just fine. He's worked on a number of projects since leaving Harry Potter, but perhaps the most well-known is his work on Community. He played Magnitude, a young student at Greendale College and self-described "one man party". We're sure we'll see more of him as the years go by.
15. Hugh Mitchell - Colin Creevey
If you're like most people who enjoyed the Harry Potter books and films, you probably found young Colin Creevey equal parts adorable and irritating. He was an easily excitable Muggleborn with a love for exactly two things: photography and Harry Potter. He was only featured in one film (Harry Potter and the Chamber of Secrets), but he and his giant camera made quite an impact. Now that he's a bit older, he's been popping up here and there on British television -- you can see him in shows like Whitechapel, The White Queen, The Last Weekend, and the World War One miniseries Parade's End starring Benedict Cumberbatch. And yes...he's significantly less annoying in these roles.