Michelle Obama told British schoolchildren she was “thrilled to be back” on a visit to Oxford University today, and told them "nothing is impossible".
The US First Lady received a rapturous round of applause as she arrived at the world famous institution’s Christ Church college.
Mrs Obama met pupils from Elizabeth Garrett Anderson (EGA) secondary school as she entered the college’s dining room.
She first met pupils from the north London secondary school two years ago when she paid them a surprise visit during a trip to the capital with US president Barack Obama.
In a nod to Harry Potter – the dining room was used as the set for the Grand Hall at Hogwarts in the films – the school girls sat at two long tables to listen to Mrs Obama’s remarks.
She told the youngsters: “How are you doing? It’s good to see you again.”
The 37 girls were specially picked for today’s event because they are interested in science and are not reaching their full potential.
The meeting with Mrs Obama marked the culmination of a day of activities at the university for the youngsters, including campus tours, career discussions and mentoring sessions.
The trip, which was arranged at Mrs Obama’s suggestion, has been designed to teach the girls about university and encourage them to think about studying for a degree.
Since visiting EGA in 2009, Mrs Obama has kept in touch with the school, writing letters and encouraging the girls in their studies.