If I recall correctly, she was attractive—even beautiful—in the books until she was imprisoned, at which point she became a shadow of her former self. However, she was imprisoned for torturing two people into insanity (I can rot13 that if necessary, but I think it’s a very minor spoiler at best), so I think it’s fair to say that she was evil before she became unattractive and not the other way around.
That is the movie.
(Warning: TV Tropes)
If I recall correctly, she was attractive—even beautiful—in the books until she was imprisoned, at which point she became a shadow of her former self. However, she was imprisoned for torturing two people into insanity (I can rot13 that if necessary, but I think it’s a very minor spoiler at best), so I think it’s fair to say that she was evil before she became unattractive and not the other way around.