Who played Neytiri in 'Avatar'?

In which film is Harry Tasker a character? Who played Sarah Connor in 'Terminator 2: Judgment Day'? Who played Jake Sully in 'Avatar'? In which film is Jake Sully a character? In which film is Neytiri a character? Who played Mikey Walsh in 'The Goonies'? Who played Sloth in 'The Goonies'? Who played Gordie Lachance in 'Stand by Me'?