From Wikipedia

Mary Wills (1914 - 1997) was an American costume designer who worked on a wide variety of feature films.

She was nominated for an Oscar seven times, earning the Academy Award for her colourful designs for The Wonderful World of the Brothers Grimm in 1962. In addition to designing for film, she has also worked on live shows, including Shipstead & Johnson's Ice Follies and the New Buffalo Bill Wild West Show.

Wills died in Sedona, Arizona, at age 82 of renal failure