US Secretary of State Condoleezza Rice will attend a six power meeting on the Iranian nuclear crisis in London on Friday, her spokesman told reporters here.
"She looks forward to getting a good and productive meeting," the State Department's Sean McCormack said.
Earlier, Britain said ministers from Britain, China, France, Germany, Russia and the United States would attend.
There had been some doubt as to whether China and Russia would attend, but McCormack said that Russian Foreign Minister Sergei Lavrov had indicated to Rice that he would be there.
The talks could place in the afternoon and early evening, he said yesterday.
Next week the United Nations Security Council is expected to begin discussing diplomatic or economic sanctions against Iran, following failed efforts to convince Tehran to freeze the development of nuclear fuel.
Washington in particular regards Iran's theocratic government as a rogue regime and has accused Tehran of using its civil nuclear power programme as a cover for alleged plans to secretly develop atomic weapons.