Michelle Obama used the flying trip to showcase her impressive brand new summer wardrobe by British-based design houses.
The first lady wore designs by Preen, Mary Katrantzou and Christopher Kane, the Independent has reported.
The 51-year-old American lawyer, accompanied by her daughters Malia and Sasha and her mother Marian Robinson, was in Britain to promote her 'Let Girls Learn' initiative, which aims to reduce the number of girls not in school and thereby improve their financial security, health and independence.
Obama landed in London without a trace of travel weariness in a bright yellow and blue lace dress by Preen.