WASHINGTON, D.C. (WHAS11) -- People are already lining up at the Supreme Court for a seat inside Tuesday's arguments on gay marriage.
It is the first time the high Court has ever heard a gay marriage case.
The Supreme Court could decide if same sex marriage should be legal in all 50 states.
It all depends on whether or not a law in California is constitutional. Kristen Perry and Sandy Stier posed on the steps of the Supreme Court hoping it will change their lives in the next few days.
As a couple for 13 years and the parents of four children, the California women want to get married.
Paul Katami and Jeff Zarrillo also want to get married and joined Perry and Stier in challenging Proposition 8, a California law which banned gay marriage five years ago.
"Fourteen times the United States Supreme Court has described marriage as a fundamental right," Kamala Harris, California Attorney General, said.
The Court could overturn the ban making same sex marriage legal in California or it could rule the ban is unconstitutional which would open the door to legalizing gay marriage in every state.
On Wednesday the Supreme Court will hear a challenge to the Defense of Marriage Act, a 1996 law which says the federal government cannot recognize same-sex marriages.
The couples will have plenty of company people have been camping outside the courtroom all weekend, hoping to get a seat inside. On Monday they waited in the snow and cold.
It's also a hot button issue on Capitol Hill. Missouri Senator Claire McCaskill announced her support of gay marriage on Monday.
Last week conservative Rob Portman said he supported it after finding out his son was gay.
But most conservatives like Kentucky Senator Rand Paul are hoping the court will uphold marriage as a traditional union between a man and a woman.
The court is expected to make announce their decision in June.