Hail to the Thief is the sixth studio album by the English rock band Radiohead. It was released on 9 June 2003 through Parlophone internationally and a day later through Capitol Records in the United States. It was the last album released under Radiohead's record contract with EMI, the parent company of Parlophone and Capitol.

After transitioning to a more electronic style on their albums Kid A (2000) and Amnesiac (2001), which were recorded through protracted studio experimentation, Radiohead sought to work more spontaneously, combining electronic and rock music. They recorded most of Hail to the Thief in two weeks in Los Angeles with their longtime producer Nigel Godrich, focusing on live takes rather than overdubs.

The songwriter, Thom Yorke, wrote lyrics in response to the election of the US president George W. Bush and the unfolding war on terror. He took phrases from political discourse and combined them with elements from fairy tales and children's literature. The title is a play on the American presidential anthem, "Hail to the Chief".

Following a high-profile internet leak of unfinished material ten weeks before release, Hail to the Thief debuted at number one on the UK Albums Chart and number three on the US Billboard 200 chart. It was certified platinum in the UK and Canada and gold in several countries. It was promoted with singles and music videos for "There There", "Go to Sleep" and "2 + 2 = 5". Hail to the Thief received positive reviews; it was the fifth consecutive Radiohead album nominated for a Grammy Award for Best Alternative Music Album, and won for the Grammy Award for Best Engineered Non-Classical Album.