Warick Davis explains Flitwick's change!

Warwick Davis answered the classic 'New look Flitwick' question via Twitter today. Why did Flitwick's look change for Prisoner of Azkaban?

When it came time to shoot 'Azkaban', there was no mention of Flitwick' in the script. However, the producer still wanted me to be in the movie so he asked if I would play the role of 'Choir Master'. Of course, I said 'yes'. When it came time to shoot 'Goblet of Fire' the director, Michael Newell said he liked the look of the choir master, and from that moment, the character became known as 'Flitwick.'