[4] It stars Hana Sugisaki, Yūki Amami, Fumiyo Kohinata, Hikari Mitsushima, Jiro Sato, Kenichi Endō, Eri Watanabe, and Shinobu Otake.

In the film, Mary Smith (Sugisaki) finds "fly-by-night", a mysterious flower that can give her the power to become a witch for only one night.

The bulb releases magical power, making the broomstick come to life and enabling Mary to ride it like a witch.

Head mistress Madam Mumblechook assumes Mary is a new pupil with Tib as her familiar, and takes her on a tour of the college.

Mary finds Peter locked in with her, and discovers that Dee has been experimenting on animals, including Gib, transforming them into fantastic creatures.

One day Charlotte found fly-by-night on the campus, leading Madam and Dee to obsessively use the flower to transform all humans into witches.

A few months after Mary Stewart's novel of the same name was published in 1971, Walt Disney Productions acquired the film rights.

In 1980, Mel Shaw and director Wolfgang Reitherman decided to adapt it into an animated feature following the release of The Fox and the Hound, but studio management, including newly-appointed CEO Ron W. Miller, felt the project was too similar to Bedknobs and Broomsticks.

After announcing it was based on The Little Broomstick, Nisimura said, "Marnie of Memories is a work that proved that Yonebayashi, who excels at dynamic painting, sealed his specialty and can draw trivial emotions.

[12] Composer Takatsugu Muramatsu, who also scored Yonebayashi's last film When Marnie Was There, is in charge of the soundtrack for Mary and the Witch's Flower.

[20][21] Altitude (the UK distributor) confirmed in early March 2018 that the film will have a special holding at selected Vue Cinemas on 10 April 2018 before its official UK-wide release on 4 May 2018.

The English dub of Mary and the Witch's Flower (starring Ruby Barnhill, Kate Winslet, Jim Broadbent) was directed by Giles New and produced by Geoffrey Wexler.

The English dub was recorded in July and August 2017 in London, and had its premiere in Los Angeles on 23 October 2017 at the GKIDS "Animation is Film" festival.

The website's consensus reads: "Mary and the Witch's Flower honors its creator's Studio Ghibli roots with a gentle, beautifully animated story whose simplicity is rounded out by its entrancing visuals.

"[27] Metacritic, which uses a weighted average, assigned the film a score of 74 out of 100, based on 26 critics, indicating "generally favorable" reviews.