Title: Supreme Court of the United States
Content:  There are currently nine justices on the Supreme Court: Chief Justice John Roberts and eight associate justices. Among the current members of the Court, Clarence Thomas is the longest-serving justice, with a tenure of days  as of ; the most recent justice to join the court is Amy Coney Barrett, whose tenure began on October 27, 2020.
Title: Supreme Court of Kenya
Content: Hon. Lady Justice Martha Koome - Chief Justice and President of the Supreme Court ; Hon. Lady Justice Philomena Mbete Mwilu - Deputy Chief Justice and Vice President of the Supreme Court ; Hon. Justice Mohamed Khadhar Ibrahim ; Hon. Justice Dr Smokin Wanjala ; Hon. Lady Justice Njoki Susanna Ndung'u ; Hon. Justice Isaac Lenaola ; Hon. Justice William Ouko The following are the current members of the Supreme Court:
Title: List of justices of the Supreme Court of the United States
Content:  The Supreme Court of the United States is the highest ranking judicial body in the United States. Its membership, as set by the Judiciary Act of 1869, consists of the Chief Justice of the United States and eight associate justices, any six of whom constitute a quorum. Article II, Section 2, Clause 2 of the Constitution grants plenary power to the President of the United States to nominate, and with the advice and consent of the United States Senate, appoint justices to the Supreme Court. Justices have life tenure, and receive a salary which is set at $255,500 per year for the chief justice and at $244,400 per year for 
Title: Chief Justice of India
Content:  The chief justice of supreme court (IAST: Bhārat Gaṇarājya ke Mukhya Nyāyādhīśa), officially the chief justice of the Supreme Court of India, is the chief judge of the Supreme Court of India as well as the highest-ranking officer of the Indian federal judiciary. The Constitution of India grants power to the president of India to appoint, in consultation with the outgoing chief justice, the next chief justice, who will serve until they reach the age of sixty-five or are removed by impeachment. As per convention, the name suggested by the incumbent chief justice is almost always the next senior most judge in the Supreme Court. However this convention has been broken twice. In 1973, Justice A. N. Ray was appointed superseding 3 senior judges. Also, in 1977 Justice Mirza Hameedullah Beg was appointed as the chief 
Title: Oklahoma Supreme Court
Content:  The Chief Justice of the Oklahoma Supreme Court is the highest ranking judicial officer in the State and is tasked with administering the state judiciary. Unlike the Supreme Court of the United States where one justice is specifically appointed to be chief, the office of Chief Justice rotates among the justices. The justice elect from among their members a chief justice and a vice chief justice to serve a two-year term. There are no term limits or age restrictions on the position. The Senior Justice of the Oklahoma Supreme Court is the current serving justice with the longest tenure on the Court. As most of the day-to-day activities of the Court are based upon seniority of the justices, the position is the third highest ranking on the Court, behind the Chief Justice and the Vice Chief Justice. As the role of Chief Justice rotates among the justices, the Senior Justice represents the institutional memory of the Court.
Title: Solicitor General of the United States
Content:  are granted review by the Court. Other than the justices themselves, the solicitor general is among the most influential and knowledgeable members of the legal community with regard to Supreme Court litigation. Six solicitors general have later served on the Supreme Court: William Howard Taft (who served as the 27th president of the United States before becoming Chief Justice of the United States), Stanley Forman Reed, Robert H. Jackson, Thurgood Marshall, and Elena Kagan. Some who have had other positions in the Office of the Solicitor General have also later been appointed to the Supreme Court. For example, Chief Justice John 
Title: Supreme Court of the United States
Content:  There are currently three living retired justices of the Supreme Court of the United States: Sandra Day O'Connor, Anthony Kennedy, and David Souter. As retired justices, they no longer participate in the work of the Supreme Court, but may be designated for temporary assignments to sit on lower federal courts, usually the United States Courts of Appeals. Such assignments are formally made by the chief justice, on request of the chief judge of the lower court and with the consent of the retired justice. In recent years, Justice O'Connor has sat with several Courts of Appeals around the country, and Justice Souter has frequently sat on the First Circuit, the court of which he was briefly a member before joining the Supreme Court. The status of a retired justice is analogous to that of a circuit 
Title: List of justices of the Supreme Court of the United States
Content:  Since the Supreme Court was established in 1789, 115 people have served on the Court. The length of service on the Court for the 106 non-incumbent justices ranges from William O. Douglas's 36 years, 211 days to the 163-day tenure of Thomas Johnson. As of, the length of service for the nine incumbent justices ranges from Clarence Thomas' to Amy Coney Barrett's. Five individuals were confirmed for associate justice, and later appointed chief justice separately: John Rutledge, Edward Douglass White, Charles Evans Hughes, Harlan F. Stone, and William Rehnquist. While listed twice, each of them has been assigned only one index number. The justices of the Supreme Court are:
Title: Chief justice
Content:  The chief justice is the presiding member of a supreme court in any of many countries with a justice system based on English common law, such as the High Court of Australia, the Supreme Court of Canada, the Supreme Court of Ghana, the Court of Final Appeal of Hong Kong, the Supreme Court of India, the Supreme Court of Ireland, the Supreme Court of Japan, the Supreme Court of Nepal, the Supreme Court of New Zealand, the Supreme Court of Nigeria, the Supreme Court of Pakistan, the Supreme Court of the Philippines, the Supreme Court of Singapore, the Supreme Court of the United States, and provincial or state supreme courts/high courts. The situation is slightly different in the three legal jurisdictions 
Title: Supreme Court (Denmark)
Content:  There are 19 judges in the Supreme Court. One of the Supreme Court justices is president of the Supreme Court, appointed by the other judges. A judge is the chairman of the Appeals Permission Board and currently a judge is on leave to serve as a judge of the European Court of Justice in Luxembourg. The Judges of the Supreme Court, like other judges, are appointed by the Minister of Justice on the recommendation of the Independent Board of Judges. Judges shall be retired at the end of the month in which they reach the age of 70, as according to section 5 of the Civil Service Act.

Question: who is the supreme justice of the supreme court?
Answer: John Roberts.