US President Barack Obama has been awarded the 2009 Nobel Peace Prize.
The Nobel Committee said he won it for “his extraordinary efforts to strengthen international diplomacy and co-operation between peoples”.
The committee highlighted Mr Obama’s efforts to support international bodies and promote nuclear disarmament.
Mr Obama’s spokesman said the president was “humbled” to have won the prize. He said he woke Mr Obama up when he called with the news early on Friday.
Mr Obama is the first US president to win the prize since former US President Jimmy Carter in 2002. Former vice-president Al Gore shared the prize in 2007.
Among earlier US leaders, Theodore Roosevelt won the prize in 1906 and Woodrow Wilson won it in 1919.
The Nobel prize was invented by the Swedish industrialist and inventor of dynamite Alfred Nobel, and was first awarded in 1901.