Schoolgirls in Zambia. Jessica Lea/DFID under a Creative Commons Licence

Every year 15 million  girls worldwide are married under the age of 18. In Zambia, it is estimated that two in every five girls are married as children, affecting their access to education and endangering their health through early pregnancy. This short film from Girls Not Brides introduces Mirriam, a 17-year-old who wants to become a doctor, and some of the activists and leaders working to make sure she and others like her are given the chance to fulfil their potential.