Noel Langley was a South African-born novelist, playwright, screenwriter and director. He wrote the screenplay which formed the basis for the 1939 film The Wizard of Oz and is one of the three credited screenwriters for the film. His finished script for the film was revised by Florence Ryerson and Edgar Allan Woolf, the other credited screenwriters. Langley objected to their changes and lamented the final cut upon first seeing it, but later revised his opinion. He attempted to write a sequel based on The Marvelous Land of Oz using many of the concepts he had added to its predecessor, but this was never released.