The United Kingdom was represented at the Eurovision Song Contest 1963 with the song "Say Wonderful Things", composed by Philip Green, with lyrics by Norman Newell, and performed by Ronnie Carroll.

In addition, the BBC was also the host broadcaster and staged the event at the BBC Television Centre in London, after the winner of the previous edition, Radiodiffusion-Télévision Française (RTF) from France, opted not to host the event.

Carroll had already represented the United Kingdom at the previous contest.

"Say Wonderful Things" won the national and went on to come 4th in the contest.

The BBC appointed Nicholas Parsons as its spokesperson to announce the British jury's votes.