David Cameron has hailed the anti-corruption summit he is hosting in London as "the biggest demonstration of the political will to address corruption that we have seen for many, many years".
The summit has brought together more than 40 countries including 12 heads of state and government.
Speaking at the end of the first day, he said attendees had shown "far more political will not just for words, but for action that will make a difference".
David Cameron has hailed the "political will" shown at the anti-corruption summit he is hosting in London
The prime minister said it was "the biggest demonstration of the political will to address corruption that we have seen for many, many years".
The summit has brought together 12 heads of state and government and a total of more than 40 countries - including Nigeria and Afghanistan, who Mr Cameron branded "fantastically corrupt" in a gaffe, earlier this week.
"Today the world has come together in a coalition of the committed to expose, to punish and to drive out corruption," Mr Cameron said in a speech at the end of the day's proceedings.
Attendees had shown "far more political will not just for words, but for action that will make a difference", he added.
"There is nothing as powerful as an idea whose time has come, and I believe that is the case with fighting and driving out corruption."
David Cameron hoped to sign up a global declaration against corruption - but only six countries put pen to paper.
Why is it happening? Who is going? And will it get awkward after the Prime Minister's 'corruption gaffe'?
David Cameron has praised Nigeria and Afghanistan for the action they have taken in combating corruption.