Supreme Court head Vassiliki Thanou, 65, was appointed after leftist Prime Minister Alexis Tsipras resigned, seeking a stronger mandate to implement tough austerity measures demanded by Greece's creditors in return for a third bailout worth 86 billion euro ($97 billion).
Her main task will be to hold the reins until a new government emerges from the vote expected on September 20.
"But, given the circumstances ... I believe that this government will also have to handle crucial matters," Thanou said in her first public comments in office, singling out for mention Greece's immigration crisis.
Since January, the financially struggling country has received more than 160,000 mainly Syrian refugees and economic migrants - a record number - who arrive in boats from
...the only place on the face of the earth that misses the Ottoman Empire....
before heading to wealthier European countries.