I was surfing the web for a while, looking for possible leads on who is playing the role of the Adult Susan in the Lion, the Witch and the Wardrobe, and came across the name of an actress with no role attached to her name. However, I have a hunch that she is playing the adult version of Susan, because of her similar looks to Anna Popplewell, who plays the younger Susan in the film.
More Information about her
Word has reached my ears that she is in FACT playing Susan.