Edwin Poots has resigned from his role as leader of the Democratic Unionist Party, after just 20 days in the job.
He faced a backlash within his own party over the decision to nominate a new Northern Ireland First Minister.
Paul Givan has taken up the role following Arlene Foster's departure - with Michelle O'Neill re-instated as deputy First Minister.
But a majority of DUP representatives were against nominating someone to the role over a concession on Irish language laws.
Edwin Poots issued a statement after a meeting of the party's executive committee this evening.
He was DUP leader for just five weeks after he was elected last month.
Arlene Foster was ousted as leader over her stance on legislation banning conversion therapy in Northern Ireland.