"Construction of the distinctive 12-storey, cube-shaped building, located between Vauxhall and Battersea in south-west London, is estimated to have cost approximately one billion US dollars.
It was funded entirely from sale of US government property in London, the embassy said, and designed by American architects KieranTimberlake.
The crystalline structure, which won the 2013 New London Architecture Award, was designed to reflect the ideals of American democracy - transparency, openness and equality.
Panoramic views of the Thames can be enjoyed through gold-starred floor-to-ceiling windows, while a glimpse of Westminster provides a reassuring nod that the capital's political heart is just a stone's throw away.
Inside, gardens representing different American states wind around the stairs linking each floor, while a semi-circular pond, not dissimilar to a moat, fronts the building.
The embassy expects to welcome 1,000 visitors a day and will employ 800 staff at the building."
Designed by an American.
He might like it better when he goes inside and realises that the windows are gold-starred.