Mary and the Witch's Flower (Japanese: メアリと魔女の花, Hepburn: Meari to Majo no Hana) is a 2017 Japanese animated fantasy film directed by Hiromasa Yonebayashi from a screenplay by Yonebayashi and Riko Sawaguchi. It was produced by Yoshiaki Nishimura, animated by Studio Ponoc, and distributed by Toho in Japan. Based on the 1971 book The Little Broomstick by Mary Stewart, it was Ponoc's first feature film. 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 film was released in Japan on 8 July 2017. The film received generally positive reviews from critics, who praised the animation and visuals.