James Arthur beat Jahmene Douglas to take the title in front of a 10,000-strong audience at Manchester Arena, with millions more watching the ITV show live on television.
Arthur looked stunned as host Dermot O'Leary announced the result and could only say "wow" when asked how he felt.
More top news
Sunday evening's weather update for the east
Sunday evening's weather update for the west
Police have confirmed a body of a woman has been found by officers searching for Gaia Pope.