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Our Political Correspondent Simon Harris has been tweeting during the address from London 2012 Chairman Lord Coe at the Conservative Party Conference.
Our Political Correspondent Simon Harris tweets on the Conservative Party Conference, as it talks about the success of the London 2012 Olympics.
Not many people can wish a Prime Minister "Happy Birthday" in one breath - and in the next call him "a broom" - and get a round of applause for both.
But that was Boris Johnson's opening gambit in his speech today to the Conservative Party Conference.
The mayor then ran through his highlights of the year: the Olympics (which he said showed that Britain is a "confident, can do" country) transport, housing, policing and his own re-election.
Critics and supporters were wondering if the speech would be Boris's pitch to un-seat David Cameron.
So how did delegates take it?
Our Political Correspondent Simon Harris reports.
Boris Johnson has used his platform speech to the Conservative Party Conference to insist he is completely loyal to David Cameron, hailing the "fantastic job" he is doing as Prime Minister.
Boris made a point of singling Mr Cameron out for praise, in response to speculation that he was positioning himself as a future leader of the Conservatives.
He commended the Prime Minister for his "firm leadership" and his ability to make "tough decisions", before predicting that he would lead the Tories to victory in a general election scheduled for 2015.
Delegates at the Conservative Party Conference are queuing up for Boris Johnson's keynote speech this morning.
Asked last night if he was flattered by all the leadership speculation, the mayor said it was "very, very bad for my ego".
He said: "I think Ken Clarke was on the money earlier on when he said that it was a distraction and it needs to end."
Veteran cabinet minister Ken Clarke has told Boris Johnson to "calm down" and "get back to the day job".
There has been growing speculation that Boris is positioning himself as a future leader of the Conservatives, following criticism of the government's stance on issues such as airport expansion.
But Ken Clarke told a fringe event that Boris needed to "settle down and demonstrate he can seriously deliver on some complicated subjects".
"My advice to Boris is get back to the day job and demonstrate you can be a serious leader of a local large city government and a serious deliverer of policy," he added.
London Mayor Boris Johnson will deliver a keynote speech at the Conservative Party Conference in Birmingham later.
Yesterday his arrival to the event was met was speculation he was out to upstage the Prime Minister.
He denies this and insists he's completely loyal to Cameron.
Latest ITV News reports
Boris Johnson has used his platform speech to the Conservative Party Conference to insist he is completely loyal to David Cameron.
Boris Johnson has caused mayhem at Birmingham's main station, as he arrived in the city for the Conservative Party Conference.