Turkish president Recep Tayyip Erdogan has formally asked his trusted ally, the transport and communications minister Binali Yildirim, to form Turkey's next government.
Mr Yildirim will replace former prime minister Ahmet Davutoglu, who stepped down amid growing differences with the Turkish leader, including Mr Erdogan's wish to overhaul of the constitution to give the largely ceremonial presidency executive powers.
Mr Davutoglu remains caretaker premier until Mr Yildirim forms a new cabinet.
Mr Yildirim's appointment came hours after the ruling party confirmed him as its new party chairman at an extraordinary convention during which the 60-year-old politician vowed to follow Mr Erdogan's path.
He made clear he intends to work toward introducing a new constitution that would change Turkey's political system into a presidential one.