The project is based on Eva Ibbotson's 1979 novel of the same name, which centers on a wizard who decides to hold a contest for the seven witches of Todcaster, with the winner set to be his new bride.
"When Brian Henson called me about it, I didn't know the book. But it's a fantastic story, and I brought in a wonderful writer, Michael Feldman, and we've written a terrific and inventive script. I'll play a character as well, which will be great fun because he actually has two eyes."
Lisa Henson revealed that casting for the other roles is currently under way, and the producers are finalizing negotiations with a digital animation studio and a foreign financier. Production will get under way early next year.