So while the boys are out to play (rumour has it Barack Obama is taking David Cameron to an NCAA basketball game), the First Ladies will be working hard at an -themed event held at Washington DC’s American University in a bid to inspire schoolchildren to embrace fitness and healthy eating.

The Camerons’ fleeting 2-day visit to the White House will round off with a touch of the red carpet treatment at a ceremony and state dinner tomorrow evening, which begs the question... which Brit and American designer will and respectively choose to wear?

Check out Michelle Obama's Style File