Horrible Histories started on CBBC in 2009. It is a multi-award-winning live-action historical and musical sketch comedy television series, based on the bestselling book series of the same name by Terry Deary. Over 11 series there have been changes in format and cast, but the core aim has remained the same - to entertain and educate. The show is produced for CBBC by Lion Television and was in association with Citrus Television for series 3-5.

Over the years, the show has featured a large talented cast. Original cast include Mathew Baynton, Simon Farnaby, Jim Howick, Martha Howe-Douglas, Dominique Moore, Laurence Rickard and Ben Willbond. Current cast includes Tom Stourton, Jessica Ransom, Richard David-Caine, James McNicholas, Emily Lloyd-Saini, Timmika Ramsay, Harrie Hayes, Inel Tomlinson, Ethan Lawrence and Paul G Raymond, among many others. Horrible Histories has also attracted an impressive list of celebrity guest stars, including Rowan Atkinson, Gemma Whelan, Sanjeev Bhaskar, Rob Delaney, Meera Syal, Rose Ayling-Ellis, The League of Gentleman, Rosie Jones, David Baddiel, Rob Rinder and Fred Sirieix.

In 2024, Horrible Histories marked 15 years on air, during which there have been 11 series, multiple specials and spin-offs, a feature film, two sold-out BBC Proms, as well as numerous accolades including nine BAFTAs, and a British Comedy Award - the only children's show to win one. It has also been awarded the Best TV Sketch Show at the Comedy.co.uk awards in 2020, 2021 and 2023. Internationally, Horrible Histories has won a total of 38 awards including two Rose d'Or for Best Children's programme, the Prix Jeunesse Special Award for Best Children's Show of the last 50 years, an International Emmy for Best Kids Factual, and in 2024 was awarded a prestigious Banff Rockie Award.

On 24 October 2024 it was announced that Horrible Histories is to be presented with a BAFTA Special Award. The honour will be awarded in recognition of Horrible Histories’ extraordinary cultural and social impact.

Production is now in its 15th year, and a spin off Horrible Science has been announced by CBBC.