Ms Sahle-Work is an experienced diplomat who has now become Africa’s only female head of state.
Her election to the ceremonial position comes a week after Prime Minister Abiy Ahmed appointed a cabinet with half the posts taken up by women.
After being sworn in, President Sahle-Work promised to work hard to make gender equality a reality in Ethiopia.
Addressing parliament, she also pledged to promote peace: “I urge you all, to uphold our peace, in the name of a mother, who is the first to suffer from the absence of peace.”
Source: BBC News