But things such as 'Harry Potter', all I can do is shape my character, seek the director's approval on that, and basically take it from there. Professor Flitwick in 'Harry Potter', I kind of defined how I saw him from reading the book, and luckily that matched up with the director's vision.
When I came up with the character of Wicket for 'Return Of The Jedi', which was my first film, I was a kid of 11 years old, and I basically was playing a very young Ewok.
When you do films that have multiple sequels, you develop a character for a film.