A United Kingdom is a 2016 biographical romantic drama film directed by Amma Asante and written by Guy Hibbert, based on the true-life romance of Seretse Khama, heir to the throne of the Bangwato Tribe in Serowe – one of many tribes found in then Bechuanaland Protectorate – with his wife Ruth Williams Khama.

[9] The film is based on the true story of the heir to the throne of Bechuanaland, Seretse Khama of the Bamangwato people, who studied law in London immediately after World War II.

Seretse discovers that the British have allowed a US mining corporation to prospect for precious stones, and is eager to make sure that, if anything is found, the exploitation of the country's resources should solely be done by the people of Bechuanaland.

The British prime minister, Clement Attlee, tells backbencher Tony Benn that Britain needs South Africa's gold and destroying the Khamas' marriage is a price worth paying.

Meanwhile, diamonds are found in Bechuanaland and Khama ensures the British government acknowledges their sovereign ownership by the Bechuana people.

[citation needed] Amma Asante is a British director, screenwriter, and former actress, born on 13 September 1969, in London, England.

Asante has also directed episodes of TV series such as The Handmaid's Tale, Mrs America, and Lovecraft Country.

The website's critical consensus reads, "Well-acted, solidly crafted, and all-around worthy, A United Kingdom presents an absorbing look at a singular true-life love story.

"[20] On Metacritic, the film has a weighted average score of 65 out of 100, based on 41 critics, indicating "generally favourable reviews".

[22] In Time Out, Tom Huddleston wrote that "David Oyelowo and Rosamund Pike are strong in this compelling and moving, if basic, true-life tale" but that the film "is just a little too cosy and sentimental for its own good.