As 'Wicked' prepares to cast its spell over the box office, we look at how portrayals of witches on screen have evolved to become symbols of female empowerment and an embracement of otherness.

Wicked, the untold story of the witches of Oz, stars Emmy, Grammy and Tony winning powerhouse Cynthia Erivo (Harriet, Broadway’s The Color Purple) as Elphaba, a young woman, misunderstood ...