Who played Buttercup in 'The Princess Bride'?

Who played Prince Akeem in 'Coming to America'? Who played Westley in 'The Princess Bride'? In which film is Westley a character? Who played Inigo Montoya in 'The Princess Bride'? Who played Harry Burns in 'When Harry Met Sally...'? In which film is Harry Burns a character? Who played Sally Albright in 'When Harry Met Sally...'? Who played Annie Wilkes in 'Misery'?