Taskmaster is a British comedy panel game show created by comedian Alex Horne. It is presented by Greg Davies, as the Taskmaster, and Horne, as the Taskmaster's assistant. In each series of the programme, a group of five celebrities (mainly comedians) attempt to complete a series of challenges, referred to as "tasks". The Taskmaster then reviews the contestants' attempts and awards points based on performance, interpretation or other arbitrary, comedic factors. A winner is determined in each episode and for the series overall.

The concept for the programme was first created by Horne for the Edinburgh Festival Fringe in 2010; he later secured a deal with Dave to adapt it for television with the first episode premiering in 2015. After the ninth series in 2019, the programme was acquired by Channel 4. The programme has completed 20 series, as well as four Champion of Champions specials and five New Year Treat one-offs as of November 2025, and is set to continue for at least one more series, one Champion of Champions, and a two-part New Year Treat until 2026.

Taskmaster's success on British television led to international versions in Australia, Belgium, Croatia, Denmark, Estonia, Finland, Iceland, Netherlands, New Zealand, Norway, Portugal, Canada (Quebec), Sweden, Spain and the United States, the last of which featured Horne reprising his role as the Taskmaster's assistant.

The show's 20th series ran between September and November 2025, featuring Ania Magliano, Maisie Adam, Phil Ellis, Reece Shearsmith and Sanjeev Bhaskar.

A British spin-off series, Junior Taskmaster, with children as competitors, premiered on Channel 4 in 2024, with Rose Matafeo as Taskmaster and Mike Wozniak as the task setter (both former contestants on Taskmaster). Additionally, a tie-in board game, two books, and a VR game have been released, as well as a live experience. During the COVID-19 pandemic, Horne hosted #HomeTasking, a series of tasks for people to film in their own homes; for each task, a montage of attempts was posted on YouTube that featured Davies awarding points to his favourite entries.