Monday night I watched a horror movie she starred in a couple of years ago, "Blood: The Last Vampire". If you couldn't guess by the title it's extremely bloody; alas, the plot is a bit thin. I don't recommend it.
This evening I watched the first bit of a movie she made in Amsterdam in 2006, called "Daisy". Haven't gotten into the meat of the film yet but it looks more promising. It's directed by Hong Kong filmmaker Andrew Lau, who was one of two credited directors on the excellent HK crime thriller "Infernal Affairs".
Through the first 15 minutes of "Daisy", which was made earlier, she does speak a few words of English, but mainly Korean.