At 42, Rishi Sunak is both Britain's youngest head of government and the first to come from diversity.
Former Minister of the Economy of Boris Johnson, he will have to straighten out a country plagued by high inflation and on the verge of recession.
In his first speech, he said he wanted to "fix the mistakes of Liz Truss and solve the deep economic crisis".
Brexiter, what will be his relationship with Europeans and the rest of the world?
Can he restore trust?