President Barack Obama told the Organisation of Islamic Conference that he has full confidence that the United States can work together with the world's largest grouping of Muslims, the OIC said on Sunday.
In a letter to OIC Secretary General Ekmeleddin Ihasanoglu, Obama said he would work to improve relations with the group, the Jeddah-based organisation said in a statement.
It did not release the text of the letter.
Obama also thanked the OIC, which represents 1.5 billion Muslims in 57 countries, for its congratulations on the occasion of his inauguration on January 20, the organisation said.
In an open letter published in major US newspapers on January 21, the OIC urged Obama to work for a "shared" peace in the world rather than one that is "imposed."
"We warmly welcome your expressed desire to give a major address in a Muslim nation soon after you assume the presidency and hope it will mark the beginning of a more fruitful and better-informed dialogue between the West and the Muslim world," the OIC said at the time.
"We firmly believe that America, with your guidance, can help foster that peace, though real peace can only be shared -- never imposed. A nation can either be great or feared, but rarely both at the same time."