The official Facebook page of Mary to Majo no Hana has posted information regarding additional cast members and revealed a new trailer. The movie is slated to premiere in Japanese theaters on July 8. For convenience sake, the article will include Mary's cast member that previously announced.
Mary: Hana Sugisaki (Omoide no Marnie)
Madam Manbulduke: Yuuki Amami (Detective Conan Movie 20: The Darkest Nightmare)
Doctor Day: Fumiyo Kohinata (Live action Kuishinbou! 3)
Akage no Majo (Red Hair Witch): Hikari Mitsushima (One Piece Film: Gold)
Furanaga: Jirou Satou (Live action Death Note)
Bankusu: Eri Watanabe (Live action Seirei no Moribito II)
Charlotte: Shinobu Ootake (Karigurashi no Arrietty)