Is it
a) Scarlett Johansson playing this films version of Lady Windemere? She gets to do all the emoting in the film, and being a naive young lass does not get to spout any of the Wildean epigrams which the film otherwise stuff into the gaps like an overfull sofa.
or
b) Helen Hunt playing Mrs Erlynne, the forty-something temptress with a secret. The secret being she does not have the delivery to spout the Wildean epigrams and her voice is annoyingly too high as well.
Answer: It would have to be a): though if Tom Wilkinson could be called an honorary woman he would walk away with this title in much the same way he completely steals the film.