United Kingdom in the Eurovision Song Contest 2003

The United Kingdom was represented at the Eurovision Song Contest 2003 with the song "Cry Baby", written by Martin Isherwood, and performed by the duo Jemini. The British participating broadcaster, the British Broadcasting Corporation (BBC), organised a public selection process to determine its entry for the contest, A Song for Europe 2003. Eight acts competed in the national final which consisted of a semi-final and a final, during which the winner was selected entirely through a regional televote.

In the final of the Eurovision Song Contest, the United Kingdom performed in position 15 and placed twenty-sixth (last) out of the 26 participating countries, failing to score any points. This was the first time that the British entry had placed last in the history of the competition and also the first time it received nul points.