David Vaughan Icke (; born 29 April 1952) is an English writer and public speaker. A former footballer and sports broadcaster, Icke has been known since the 1990s as a professional conspiracy theorist. He is the author of over 20 books and numerous DVDs, and has lectured in over 25 countries, speaking for up to 10 hours to audiences.

Icke was a BBC television sports presenter and spokesman for the Green Party when, he claims, a psychic told him, in 1990, that he had been placed on Earth for a purpose and would begin to receive messages from the spirit world. The following year he announced that he was a “Son of the Godhead”, and that the world would soon be devastated by tidal waves and earthquakes, a prediction he repeated on the BBC’s primetime show Wogan. The show changed his life, turning him from a respected household name into someone who was laughed at whenever he appeared in public.