I just watched this very good movie from Terry Gilliam. The plot revolves around the famed brothers getting sucked into a real experience that is like those from their tales. One critic I read complained that the movie was not an accurate depiction of the Grimms' lives! I hadn't seen the movie yet, but I wondered if this fellow had heard of fiction? Does he go see Hamlet and grouse that the play isn't historically accurate?
In any case, while the plot is as described above, the theme is German romaticism versus French rationalism, a feud in which the Grimms played a significant part. Well worth seeing.