From the desk of The Movie Snob:

Just Like Heaven (B). This new romantic comedy starring Reese Witherspoon and Mark Ruffalo has its protagonists meet under very unusual circumstances. The opening scenes establish that Dr. Elizabeth Martinson (Witherspoon) is a driven young physician who has no time for anything but her job. One rainy night after a 26-hour shift at the hospital, she has a head-on collision with a truck. Flash forward some unspecified amount of time, and mopey David Abbott (Ruffalo) rents Martinson's old apartment. Martinson's ghost pops up, only Abbott can see or hear her, and the movie takes off from there. Aside from one pretty good twist, the plot is nothing special, so the movie largely hangs on the charms of its actors. They aren't bad. Witherspoon somehow makes her super-Type A character likeable, and she and Ruffalo have some chemistry. Donal Logue (The Tao of Steve) adds a few laughs as Abbott's offbeat friend and counselor. And Napoleon Dynamite himself, Jon Heder, shows up as an eccentric occult-bookstore employee who tries to help the odd couple out. It's heavier than most rom-coms, but not bad.