Michelle Williams disappears so deeply into her new movie "Wendy and Lucy," it's like you're watching a documentary. Williams plays Wendy, a down-on-her-luck woman on a long drive to Alaska, where she hopes to find work. But she runs into a string of problems in Oregon, after she parks her car one night at a Walgreens and falls asleep in the driver's seat. The next morning, a security guard rouses her to tell her to move, but the car won't start. The nearest auto shop is closed, though she doesn't know if she has enough money left for repairs anyway. Worst of all, her traveling companion—a yellowish mutt that makes up the second half of the film's title—is starving, so Wendy wanders into a grocery store to swipe food. She stuffs her pockets with bread, and then she's suddenly distracted by a tabloid with Jennifer Aniston on the cover —and we are, too. For the first time, it's not Michelle Williams the actress on screen. It's Michelle Williams the celebrity, face to face with a kind of cracked mirror of her own fame. "That was Kelly [Reichardt, the director]'s idea, and I was like, 'Noooo,' but I like the inherent risk in it," Williams says. "I'm just glad it didn't have my face on it. That would've really taken you out of the movie."