If you're anything like me, you've probably heard that Jenny Lewis of Rilo Kiley was in Pleasantville. However, you weren't fortunate enough to have seen the movie in theaters, and whenever you watch the movie as it is shown over and over on TNT, you just can't find her!
Of course, the internet is no help at all, oh woe is me!
So I've just thrown this page up here. Jenny was indeed in Pleasantville. She was one of Jennifer's (Reese Witherspoon) friends while they were still in the real world. She shows up about 7 minutes into the movie.