Thanks to Ralf for these great screencaps which have been brightened so that Kirsten shows up better !. I wonder how many people (other than me and Ralf !) noticed that Kirsten was in this film ?.
According to producer Mark Gordon, she visited her then boyfriend Jake Gyllenhaal at the set of the film The Day After Tomorrow (2004) and that visit gained her an uncredited cameo appearance [IMDB Bio]