London, 1947. He was the heir to an African kingdom. She was a white English insurance clerk. When they met and fell in love, it would change the world.

This is the inspiring true story of Seretse Khama and Ruth Williams, whose marriage sent shockwaves through the establishment, defied an empire - and, finally, triumphed over the prejudices of their age.

'Reading the book, I realised that I had never seen an African love story of this cinematic scope. It spoke to me as an African, as a man, as a romantic' David Oyelowo