<Table> <Tr> <Th colspan="2"> Chief Justice of the United States </Th> </Tr> <Tr> <Td colspan="2"> </Td> </Tr> <Tr> <Td colspan="2"> Incumbent John Roberts since September 29 , 2005 </Td> </Tr> <Tr> <Th> Style </Th> <Td> The Honorable ( formal ) Mr. Chief Justice ( informal ) Your Honor ( when addressed directly in court ) </Td> </Tr> <Tr> <Th> Appointer </Th> <Td> Presidential nomination with Senate confirmation </Td> </Tr> <Tr> <Th> Term length </Th> <Td> Life tenure </Td> </Tr> <Tr> <Th> Constituting instrument </Th> <Td> U.S. Constitution </Td> </Tr> <Tr> <Th> Inaugural holder </Th> <Td> John Jay as Chief Justice of the Supreme Court September 26 , 1789 </Td> </Tr> <Tr> <Th> Formation </Th> <Td> March 4 , 1789 </Td> </Tr> </Table>
who is the supreme justice of the supreme court
John Roberts