Miss Havisham: surprisingly young and hot

I just discovered that Helena Bonham-Carter and Gillian Anderson will be playing the role of Miss Havisham in two separate adaptations of Great Expectations due out next year. I'm sure they'll both be great, but what is up with this casting? These actresses seem awfully young for the role*, and they're both gorgeous (although Bohnam-Carter isn't afraid to hide her light under a very quirky bushel). Does this mean that both adaptations will be trying to up the sex appeal?

*While I don't think Dickens actually defined the character's age, Miss Havisham is usually depicted as being elderly. However, considering Dickens's views on women, he might consider mid-40s as practically doddering....