The law against gay sex, known as "Section 377", was introduced during British rule of South Asia more than a century-and-a-half ago.
This isn't the first time that Section 377 was struct down.
"The UN in India sincerely hopes that the court's ruling will be the first step towards guaranteeing the full range of fundamental rights to LGBTI persons".
Cakes and champagne rounded out the hotel party while Suri said Thursday's judgement was just the beginning of the battle for LGBT recognition.
In a landmark verdict, the Supreme Court today put an end to Section 377 that criminalises homosexuality in India.
"Such a view is constitutionally impermissible", stated CJI Misra, who wrote the judgment for himself and Justice Khanwilkar. "Constitutional morality can not be martyred at the altar of social morality".
"Any consensual sexual relationship between two consenting adults - homosexuals, heterosexuals or lesbians - can not be said to be unconstitutional", said the Chief Justice of India, Dipak Misra, as he read out the judgment.
Activists and well-wishers outside jumped for joy while waving gay pride flags and placards reading "Love Wins" and "LGBT rights are human rights". One of the judges, Indu Malhotra, said she believed the LGBT community was owed an apology.
In its 493-page judgement, the bench said aspects of Section 377 dealing with unnatural sex with animals and children remain in force.
The bench said courts must protect the dignity of an individual as right to live with dignity is recognised as fundamental right. It said the State can not persecute people and decide the boundaries between what is permissible or not, holding that Section 377 IPC was based on "deep-rooted stereotypes of the society" that was violative of fundamental rights to equality and life with dignity.
A five-judge bench in India's Supreme Court was unanimous in overturning the ban.
He declared, "The choice of whom to partner, the ability to find fulfilment in sexual intimacies and the right not to be subjected to discriminatory behaviour are intrinsic to the constitutional protection of sexual orientation". "We also hope that the judgment will boost efforts to eliminate stigma and discrimination against LGBTI persons in all areas of social, economic, cultural and political activity, thereby ensuring a truly inclusive society". "Therefore, Section 377 IPC in its present form violates Article 19 (1)(a) of the Constitution".
Activists in Muslim-majority Bangladesh and Pakistan said they planned to push for reform of the laws that their countries also inherited from colonial Britain.
The writ petitions were opposed by the Apostolic Alliance of Churches and Utkal Christian Association and some NGOs and individuals. Back in July of 2009, the Delhi High Court decriminalized homosexuality, but it didn't stick.