The Worst Witch
Mildred "Millie" Hubble is the protagonist of the series. She is a good-hearted, but bungling young witch-in-training, who never seems to get anything right. She is friends with Maud Spellbody and Enid Nightshade and has a strong rivalry with Ethel Hallow. It is Miss Hardbroom, her potions teacher, who calls her "The Worst Witch".
Una Stubbs
She is also known for her role as Miss Bat in the series "The Worst Witch" and has most recently appeared as Sherlock Holmes's landlady Mrs Hudson in the BAFTA award-winning television series "Sherlock".