The US President and First Lady Jill Biden touched down in Air Force One at RAF Mildenhall, Suffolk.
The UK is the first overseas trip Mr Biden has embarked on since he become US President in January.
The 78-year-old will meet US air force servicemen stationed in the Suffolk military base.
The US President and First Lady are then expected to fly to Cornwall Airport Newquay ahead of the meeting of world leaders, which begins on Friday.
This is a developing news story, more to follow