Who played Edward Cullen in 'Twilight'?

Who played Gollum in 'The Lord of the Rings: The Two Towers'? Who played Katniss Everdeen in 'The Hunger Games'? Who played Bella Swan in 'Twilight'? In which film is Bella Swan a character? Who played Elphaba in 'Wicked'? In which film is Elphaba a character? Who played Glinda in 'Wicked'? In which film is Glinda a character?