President Donald Trump has replaced Rex Tillerson at Secretary of State with Central Intelligence Agency director Mike Pomeo, after months of speculation surrounding Tillerson's role in the Trump administration.
Mr Trump tweeted that Mr Pompeo, "will do a fantastic job!" and thanked Mr Tillerson for his service. Mr Trump also had words of praise for Tillerson: "Finally, I want to thank Rex Tillerson for his service".
Mr Pompeo will replace him at the State Department, and Gina Hapsel - the deputy director at the CIA - will succeed him at the CIA, becoming the first woman to run the spy agency, if confirmed.
Tillerson is the latest high-ranking official in the Trump administration to resign.
The breaking point appears to be Trump's surprise announcement last week that he was willing to meet with North Korean leader Kim Jong-un, according to CBS News.
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Tillerson also opposed Trump's decision this month to impose tariffs on certain steel and aluminum imports. In October, NBC reported that Tillerson called the president a "moron" following a meeting in July.
The two have also differed in their attitudes toward Russian Federation; while Trump prefers to give Vladimir Putin the benefit of the doubt on nearly everything, Tillerson has taken a more traditional and skeptical view of the country.
Trump announced the move via tweet.
The Secretary of State was reportedly asked Friday to return to Washington and informed he would be let go by Trump. Mike and Gina have worked together for more than a year, and have developed a great mutual respect.