Robby the robot was the real star

I've seen Forbidden Planet(see also here, and ImdB, here.) on teevee but I don't remember the girl being quite so va-va voomy as in the poster. I wonder if pubescent teenage boys in the fifties talked about the letdown after actually seeing the movie, whether this one or any other from among the numerous for which the ingenue's figure was better represented by the poster artist than in the picture itself.