The New Worst Witch is a television series, based on Jill Murphy's The Worst Witch books, about a group of young witches at a Witch Academy. It ran for two series from 2005 to 2007. The series was a spin-off from The Worst Witch TV series that ran from 1998 to 2001.The series followed Henrietta "Hettie" Hubble (Mildred's younger cousin), through her years at Cackle's Academy. Mildred is seen at the start of the first episode riding her cousin's broom close to Cackle's and she then disappears. Hettie quickly becomes best friends with Mona Hallow (who happens to be Ethel's younger sister) and Crescentmoon "Cressie" Winterchild. Hettie and her friends' new enemy is Belladonna Bindweed and her sidekick Cynthia Horrocks. Miss Hardbroom and Miss Cackle return, and are joined by new members of staff Caspian Bloom, Miss Swoop, and Miss Widget/Miss Nightingale.

The New Worst Witch was initially planned to have a third season in 2007, however Alice Connor who played Henrietta Hubble in the series along with several other cast members decided not to sign onto the third season and thus was subsequently canceled the same year.

During November 2009, CITV showed all episodes of The New Worst Witch.