The Worst Witch is a fantasy drama children's television series that aired on CBBC and ZDF from 11 January 2017 to 20 April 2020, with each series being later available to stream on Netflix. Based on the book series of the same name by Jill Murphy, the series follows Mildred Hubble (Bella Ramsey and Lydia Page) and her friends Maud Spellbody (Meibh Campbell and Megan Hughes) and Enid Nightshade (Tamara Smart), and rivals Ethel Hallow (Jenny Richardson), Drusilla Paddock (Tallulah Milligan) on their adventures and education at Cackle's Academy under caring headmistress Miss Cackle (Clare Higgins) and strict deputy headmistress Miss Hardbroom (Raquel Cassidy).

The series was made available to stream internationally on Netflix on 22 July 2017. It was available to members in the United Kingdom, Ireland and Germany after its premiere on CBBC and ZDF. The series premiered on CBBC on 11 January 2017. A second series began airing from 8 January 2018. The second series premiered on Netflix Australia on 27 July 2018. The third series began airing on 7 January 2019. The fourth series began airing on 27 January 2020. Netflix released the fourth series on 1 October 2020.