World Bank President Jim Yong Kim has made the surprise announcement that he is stepping down after six years in the post.
His resignation will take effect from February 1.
The 59 year-old was not due to leave until 2022, after he was re-elected for a second five-year term in 2017.
The World Bank says he will join a firm and focus on increasing infrastructure investments in developing countries.
No reason was given for his unexpected resignation.