Tom Knight (actor)

Several actors of the United Kingdom and Ireland have voiced or portrayed characters appearing in the Harry Potter film series based on the book series by J. K. Rowling. Daniel Radcliffe, Rupert Grint and Emma Watson have played Harry Potter, Ron Weasley and Hermione Granger in all the films. When they were cast only Radcliffe had previously acted in a film. Complementing them on screen are such actors as Helena Bonham Carter, Jim Broadbent, John Cleese, Robbie Coltrane, Warwick Davis, Ralph Fiennes, Michael Gambon, Brendan Gleeson, Richard Griffiths, Richard Harris, John Hurt, Jason Isaacs, Miriam Margolyes, Helen McCrory, Gary Oldman, Alan Rickman, Fiona Shaw, Maggie Smith, Timothy Spall, Imelda Staunton, David Thewlis, Emma Thompson, and Julie Walters, among others. Thirteen actors have appeared as the same character in all eight films of the series.

...
Wikipedia