She wrote: "5 years ago, I was shot in an attempt to stop me from speaking out for girls" education.
She is studying philosophy, politics, and economics.
Malala shot to prominence when a Taliban gunman shot her in the head in 2012, after she was targeted for her campaign against efforts by the regime to deny women education in Pakistan. She had been writing an anonymous blog about life under Taliban rule and the shooting was an attempt to silence her.
Yousafzai, the world's youngest Nobel Peace Prize laureate, announced on Twitter on Monday (Oct 9) that she was attending her first classes at the elite British institution.
Yousafzai, who addressed the United Nations on her sixteenth birthday and met privately with Queen Elizabeth and Barack Obama, still faced freshman jitters. She is based at Lady Margaret Hall.
The Pakistani teenager miraculously survived and has since given her all as an advocate for girls' right to an education.
Benazir Bhutto, first female prime minister of Pakistan, also attended Oxford in the 1970s.
To which Malala replied that she would be transferring schools if this were to happen.
She later became the youngest Nobel laureate after winning the Peace Prize at the age of 17 and has also won the European Union's human rights award. That's why when she tweeted that she was to begin her studies at Oxford, five years to the day from when she was shot in the head for speaking out about the right girls have to receive an education, she was met with an outpouring of support.
"Packing for university Any tips?" But there were two items she said she would definitely add to her suitcase: English Breakfast tea and flip-flops for the dormitory shower.