Boris Johnson has been the clear star of the Conservative conference in Birmingham so far. Everywhere he went, the press scrum followed.
He's the man who makes Tory hearts beat a little faster.
But is he a serious threat to David Cameron? After his reception today, he certainly looks like one.
Boris has pledged his loyalty to the Prime Minister, telling the Conservative Party conference David Cameron will win the 2015 election.
London Mayor Boris Johnson will deliver a keynote speech at the Tory party conference, amid speculation about his leadership ambitions.