Despite a lingering myth that
Shirley Temple was originally cast as
Dorothy Gale in
The Wizard of Oz (1939) when
20th Century-Fox was to loan her to
Metro-Goldwyn-Mayer in exchange for
Clark Gable and
Jean Harlow until the plan fell through following the latter's death in June 1937, she had been only briefly considered because she was a proven box-office draw and MGM did not acquire the rights to
L.Frank Baum's
first Oz book until seven months after Harlow died.
Arthur Freed, an uncredited producer on
The Wizard of Oz, wanted rising child star
Judy Garland for the lead role. When producers listened to Temple's singing voice, they were unimpressed. Temple would not have been available in any event because Fox refused to loan her to other studios.
Gale Sondergaard was initially cast as the
Wicked Witch of the West. During pre-production, an early idea was to have the witch portrayed as a slinky, glamorous villainess in a black, sequined costume, inspired by the
Evil Queen in
Walt Disney's
Snow White and the Seven Dwarfs (1937). Sondergaard was photographed for two wardrobe tests, both of which survive—one as a glamorous witch, and another as a conventionally ugly one. After the decision was made to have an ugly witch, Sondergaard, reluctant to wear the disfiguring makeup and fearing it could damage her career, withdrew from the role, and it went to veteran character actress
Margaret Hamilton. When
The Wizard of Oz became a success and shot Judy Garland to fame, Fox moved to create their own fantasy feature starring Temple and Sondergaard, and based on the 1909 fantasy play
The Blue Bird by
Maurice Maeterlinck. Walt Disney had previously attempted to purchase the rights to the play to create an animated adaptation. In imitation of
The Wizard of Oz, the opening scenes are in black-and-white (though without a
sepia tint), although the opening credits are in color. But unlike in
The Wizard of Oz, when
The Blue Bird changes to full color, it remains as such for the remainder of the film. Producer
Darryl F. Zanuck changed the Tyltyl character (played by
Johnny Russell) to be much younger than Temple's Mytyl character, as he felt that a boy of closer age would have to be mentally incompetent to allow a girl to take leadership away from him. Zanuck also dropped some of the characters in the original story such as Bread, Water, Fire, Milk, Sugar and Night, as he wanted the story to focus more on Temple as the star. He also wanted to cast
Bobs Watson as Tyltyl,
Gene Lockhart as Daddy Tyl,
Joan Davis as Tylette,
Jessie Ralph as Mrs. Berlingot,
Anita Louise as Light,
Zeffie Tilbury as Granny,
George Barbier as Grandpa,
Andy Devine as Cold in Head and
Berton Churchill as Time. ==Differences between film and play==