11 and 10. Jonny Greenwood And Phil Selway
Jarvis Cocker, the frontman of Pulp, the Britpop band best known for songs such as Common People, This Is Hardcore and Disco 2000, makes a memorable appearance as the singer of the band that plays at the Yule Ball in Harry Potter and the Goblet of Fire. Less attention is given to the other members of his musical ensemble, which included Pulps Steve Mackey on bass, Jason Buckle of All Seeing I on rhythm guitar and Steven Claydon of Add N to (X) on bagpipes and keyboards. Most notably, however, the group featured two members of Radiohead, the widely renowned group who have now been in the music industry for 28 years - lead guitarist Jonny Greenwood and drummer Phil Selway. On a footnote, Stone Roses frontman Ian Brown also pops up in the series, though he appears as a pub patron in Prisoner of Azkaban rather than as a band member.
9. Rade Šerbedžija
A veteran character actor, Rade Šerbedžija has been in the business for several decades now, first appearing in a number of films in what was then his native Yugoslavia before appearing in British and American productions such as Snatch, Batman Begins, 24 and Mission Impossible II. In the Harry Potter series, the Croat appears very briefly as Gregorovitch, an Eastern European wandmaker who is tortured and killed by Voldemort during his pursuit of information regarding the Elder Wand in the first part of Harry Potter and the Deathly Hallows.
In the books, Gregorovitch is disposed of in a similarly quick fashion, though he is also briefly mentioned in the Goblet of Fire as an alternative wandmaker to Ollivander.