This is the movie on the making of the Mary Poppins Disney flick. The author (P.L. Travers) is a real Grinch and totally opposed to the Disneyfication of her book and argues with Walt all the time. You fnd out why she is as she is during film. Great review so far. Tom Hanks, Emma Thompson.
Anyway, writing to say that the review says to stay for the credits, as you hear a tape of the real author yelling at the makers in the background.