Malala Yousufzai said that she would not ordinarily miss a day of lessons - but made an exception for her Buckingham Palace visit:
I had to miss school because I was meeting the Queen.
It's such an honour for me to be here at Buckingham Palace. It's really an honour to meet the Queen.I also wanted to raise the issue of girls not being educated on a higher platform so that the government in each country takes action on it.We need to fight for education in the suffering countries and developing countries, but also here.
Malala Yousufzai spoke to the Queen about the importance of education when they met at Buckingham Palace.
The teenager, accompanied by her father Ziauddin, gave the Queen a copy of her book, I Am Malala, during their meeting in the palace's White Drawing Room, telling her: "It is a great honour for me to be here, and I wanted to present you with this book."
Accepting the gift, the Queen replied: "That's very kind of you," before chatting with the teenager for a few moments.
She was reduced to laughter by a comment from the Duke, who quipped that in this country, people want children to go to school to get them out of the house. Malala covered her face while in a fit of giggles at his joke.
Malala Yousafzai is expected to meet the Queen of England at Buckingham Palace later today, adding another famous name on her global whistle stop tour to fight for young children to have the right to education.
The schoolgirl has been on a global whistle stop tour, meeting Bono, accepting a Pride of Britain award from David Beckham and chatting with the Obamas at the White House.
She urged Obama to stop using drone attacks and focus funds on educating Pakistani children instead.
Malala narrowly missed out on winning the Nobel Peace Prize last week but has released an autobiography, I Am Malala: The Girl Who Stood Up for Education and was Shot by the Taliban to much acclaim.