Decided? Supreme Court Justice Ruth Bader Ginsburg has spoken - and acted - in a way which suggests her strong supporting for legalizing same sex marriage . Ruth Bader Ginsburg has already made up her mind about gay marriage, a report has claimed, ahead of a landmark Supreme Court hearing which could legalize the practice nationwide. The famously liberal justice, who is 82, will be part of a decision which begins hearing arguments tomorrow on whether states are allowed to ban same-sex unions and refuse to recognize those made in other states. Ginsburg, who has sat on the court since 1993, has been unusually open about her opinions ahead of the cases. cutting against a long-held tradition of not speaking out in advance. The new report, Yahoo! Politics, cited interviews in which Ginsburg has referred to the American public becoming more accepting of gay rights in general - and has even officiated at same-sex ceremonies. Ahead of the first such ceremony, held in Washington, D.C.,  in August 2013, she told the Washington Post that she understood the symbolic implications of her involvement. She said the wedding, of her friend Michael M. Kaiser, president of the Kennedy Center, to economist John Roberts, would 'be one more statement that people who love each other and want to live together should be able to enjoy the blessings and the strife in the marriage relationship.' She will get the chance to make her views known in the upcoming case of Obergefell v. Hodges, for which arguments will be heard from Tuesday and a decision is expected this summer. The case is being brought by James Obergefell, an Ohio man who married his husband in Maryland but was not allowed to name himself as spouse on his husband's death certificate in his home state. Currently 37 states allow gay marriage, as well as Washington, D.C. - but Ohio is one of 13 which has held out. Protests: Pictured are gay rights protesters camped out in front of the Supreme Court this weekend. Obergefell v. Hodges will be heard from tomorrow . Votes: Ginsburg is one of four liberal-voting Supreme Court justices, though Anthony Kennedy (front row, second from right) has often sided with them on gay rights issues. Pictured above are all the Supreme Court Justices. On the front row (left to right) are Clarence Thomas, Antonin Scalia, John G. Roberts, Kennedy and Ginsburg. Behind them (also left to right) are Sonia Sotomayor, Stephen Breyer, Sameul Alito and Elena Kagan . The Supreme Court will determine whether the Constitution guarantees all citizens the right to same sex marriage, which could void all the remaining bans. And if it determines that recognizing gay marriage is still up to individual states, the court could also decide that states are obliged to recognize gay marriage performed elsewhere in the U.S. After a 2012 ruling, the federal government is already required to recognize gay marriage in states where they are allowed. The liberal wing's four justices are expected to vote in favor of gay marriage, and could be joined by the more conservative Anthony Kennedy, who has often sided with liberals on issues of personal freedom, which would provide the five votes necessary for a majority. In an interview with Bloomberg earlier this year, Ginsburg insisted that 'it would not take a large adjustment' for Americans to accept gay marriage across the board, and that the country has become far more accepting. Gay marriage opponents have said that Ginsburg previous actions and public statements go so far as to make her unfit to hear the case. Battle: The case was prompted by James Obergefell, left, who wants the state of Ohio to recognize him as his husband's spouse on his death certificate. He is taking on Richard Hodges, right, who leads Ohio's department of health . Couple: Obergefell, left, married his husband John Arthur in Maryland shortly before his death - but has not been allowed to name himself as Arthur's spouse on his death certificate . Both the National Organization for Marriage and the American Family Association, which oppose gay marriage, have demanded that Ginsburg remove herself from the case because she officiated over the ceremony. They made the same demand of Justice Elena Kagan, another liberal justice, who has officiated a ceremony as well. If both justices were to agree it would leave the court two liberals down and unlikely to side with the legalization. However, according to legal scholars, neither has done anything wrong because the earlier court decision had already vindicated same-sex marriages in states which had legalized them. It has been speculated that Justice Kennedy could be the swing vote in this issue. A recent report by the Associated Press speculated that his professional links with a California law school dean who hired him in the 1950s could have embedded some early sympathies. The report, citing people who knew him when he taught at McGeorge School of Law in Sacramento, said that being mentored by Gordon Schaber, who never married and was widely thought to gay, could swing him towards favoring gay rights. Kennedy is likely, the report said, to eventually write the Supreme Court decision in Obergefell v. Hodges, which would follow several other written opinions expanding gay rights.
Liberal champion, 82, has spoken widely about gay rights .
She even officiated at a same-sex ceremony in August 2013 .
Opponents have said it makes her unfit to rule on upcoming case .
Obergefell v. Hodges will be heard by nation's top court from this week .
Case will decide whether all states have to allow gay marriages .
Even if not, could be forced to recognize gay marriages in other states .
Ginsburg is in liberal minority in the Supreme Court .
But conservative Anthony Kennedy often votes in favor of gay rights .