Ethiopian Prime Minister Abiy Ahmed has won the 2019 Nobel Peace Prize for his peacemaking efforts with Eritrea.
Ethiopia and Eritrea, long time foes who fought a border war from 1998 to 2000, restored relations in July 2018 after years of hostility.
"Ethiopian Prime Minister Abiy Ahmed Ali has been awarded this year's Nobel Peace Prize for his efforts to achieve peace and international cooperation, and in particular for his decisive initiative to resolve the border conflict with neighbouring Eritrea," the Norwegian Nobel Committee said in its citation.
"The prize is also meant to recognise all the stakeholders working for peace and reconciliation in Ethiopia and in the East and Northeast African regions," it added.
At 43, Abiy Ahmed is the youngest head of government in Africa.
The committee had to choose from more than 300 nominations this year.
Online betting sites had put Swedish climate activist Greta Thunberg, who has already received Amnesty International's top honour and the Right Livelihood Award, sometimes dubbed the "alternative Nobel", as the name to beat.
Last year, the honour went to Congolese doctor Denis Mukwege and Yazidi campaigner Nadia Murad, for their work in fighting sexual violence in conflicts around the world.
This year's prize will be presented at a ceremony in Oslo on December 10, the anniversary of the 1896 death of prize creator Alfred Nobel, a Swedish philanthropist and scientist.
The prize, which is worth around €850,000, will be presented in Oslo on 10 December.
"This victory and recognition is a collective win for all Ethiopians, and a call to strengthen our resolve in making Ethiopia - the new horizon of hope - a prosperous nation for all," the prime minister's office said.
It quoted Abiy as saying: "We are proud as a nation."