In which film is Bella Swan a character?

In which film is Legolas a character? 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'? Who played Edward Cullen in 'Twilight'? Who played Elphaba in 'Wicked'? In which film is Elphaba a character? Who played Glinda in 'Wicked'?