Probably the most thankless job a director can set himself is trying to adapt a beloved stage musical to screen, as the people you most need to win over for your movie to be a success (fans of the stage version) are also the people most likely to tar and feather you in the streets over the slightest deviation from the source material. You may think comic fans get salty about adaptation changes, but they have nothing on musical theatre nerds.

That’s probably why, despite musicals still being a lucrative movie genre, stage musicals adapted to screen are a rare beast and only getting rarer. Of the 50 top grossing movie musicals, only six began life on stage. The rest are either originals like The Greatest Showman, animated musicals or jukebox musicals like Bohemian Rhapsody or (sigh) Alvin and the Chipmunks.

Of course, it wasn’t always thus. The middle decades of the 20th century were a golden age for adaptations for stage musicals as that was the point where theatre and cinema were most alike. Colour photography and improvements in sound tech meant that cinema could finally match the visual and audio splendour of theatre. But, cinema had yet to fully embrace the freedom inherent in the medium and movies of the first half of the century often closely resembled filmed plays with constructed sets and static cameras. As cinema became less and less indebted to its theatrical roots, adapting stage musical to screen became a lot more challenging. To put it simply: movies are not plays and plays are not movies. And trying to turn one into the other can result in some pretty radical changes. And all those challenges are right up on screen in Into the Woods, a movie based on one of the most inherently theatrical musicals of the modern era.