The Supreme Court will hear arguments in two cases of same-sex marriage for the first time on Tuesday and Wednesday.
The court is considering challenges to both California's Proposition 8 and the Defense of Marriage Act. Both laws aim to block same-sex marriage from becoming legal.
The first case the court will take up is Proposition 8, the ballot initiative that bans same-sex marriage in California. On Wednesday, the court will hear opposition to the Defense of Marriage Act that bans the federal government from recognizing same-sex marriages.
The California case could carry implications for other states as a broad ruling could overturn other state laws banning same-sex marriage, or Proposition 8 could be upheld, and in turn, the issue would still be left up to each individual state.
FOX News reports spectators have been lining up all weekend outside the court in Washington to witness the historic uptake and hear the arguments.
Nine states -- Connecticut, Iowa, Maine, Maryland, Massachusetts, New Hampshire, New York, Vermont, and Washington -- and the District of Columbia allow same sex marriage.