"Fifteen to One" is a British general knowledge quiz show broadcast on Channel 4. It originally ran from 11 January 1988 to 19 December 2003 and had a reputation for being one of the toughest quizzes on TV. Throughout the show's original run, it was presented and produced by William G. Stewart.

On 9 December 2013, it was announced that "Fifteen to One" would return for a new 20-part daytime series in 2014, hosted by Sandi Toksvig, and primetime celebrity specials, which would be hosted by Adam Hills. There were ten series and 370 episodes in the revived edition which ran from 5 April 2014 to 28 June 2019.

Sandra Birgitte Toksvig (born 3 May 1958) is a British-Danish writer, comedian, broadcaster, actor, podcaster, TV presenter and producer on British radio, stage, and television. She is also a political activist, having co-founded the Women's Equality Party in 2015. She has written plays, novels, and books for children.

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