U.K. Prime Minister David Cameron and French President Nicolas Sarkozy called on Libyan's to organize a transition that will oust current Libyan Leader Muammar Gaddafi from power.

The call comes just ahead conference in London on Tuesday will include representatives from many of the same countries and organizations currently enforcing and backing a no-fly zone over Libya which has enabled rebels to begin advancing westward against forces backing Libyan leader Muammar Gaddafi.

We call on all Libyans who believe that Qadhafi is leading Libya into a disaster to take the initiative now to organize a transition process, Cameron and Sarkozy said in a joint statement on Tuesday.

More than 40 representatives from various groups with overlapping membership will attend, including NATO, the United Nations, the Arab League, the African Union and the UN's Organization of the Islamic Conference.

Mahmoud Jebrill, a Libya opposition leader will also attend, a European diplomat told Bloomberg News. The official was not authorized to publicly discuss the meeting in advance.

We do think it's very important to spell out an end-state, a vision of where this goes, said Denis McDonough, U.S. Deputy National Security Advisor told reporters on Monday.

He said the Obama Administration has been working on what that would be, but it would be announced by his superiors at a later time.