Madhi19 Reddit new post madhi19 on TIL Emma Watson almost wasn't Hermione in the Half-Blood Prince. She had considered not returning but decided that she wouldn't be able to watch someone else play Hermione.

You need to watch that movie again. She barely in it and not doing much.

from overview for madhi19 http://www.reddit.com/r/todayilearned/comments/2qrwlr/til_emma_watson_almost_wasnt_hermione_in_the/cn98edw