A new movie is being made of Ballet Shoes, by Noel Streatfeild, due to start production in August. They are apparently having trouble casting it --here's an article explaining the difficulty. Ballet Shoes is one of the books from my childhood I read ad nauseam-- it's the tale of three sisters at a stage school in pre-WWII London. Along with White Boots (aka Skating Shoes) and Curtain's Up (aka Theatre Shoes), it's my favorite Streatfeild, so I hope they are kind to it. The BBC did a version in 1975 (shown at left), but I've never seen it.
When I lived in England a while ago, I was staggered to realize how many books she had written that are not readily available over here. Here's a full list of her books.