Here's what Hollywood is saying -- some reactions from celebrities, many of whom have campaigned for gay rights.
• Jesse Tyler Ferguson tweeted: Remember the old days when #DOMA was around and gay people couldn't get married in California? Crazy right!?
• Ricky Martin tweeted: #PROP8 IS GONE! #DOMA IS GONE! #SCOTUS #LoveIsLove.
• Adam Shankman tweeted: #DOMA IS DEAD!!! #SCOTUS has done the right thing, and now the love of my life and I can get our constitutionally guarunteed rights! Wahooo!
• And this is George Takei on Facebook:
"Today marks a watershed moment in history and a tremendous victory for the principle of equality. The 5-4 decision by our Supreme Court striking down DOMA affirms the universality of love -- the desire of all people not only to find, but to value and affirm, a lifelong commitment to another person.
"I have lived nearly four score years, and have borne witness to both the heartbreak and promise of true justice and equality in America. Today my heart soars, and my faith in the promise of our great nation is renewed.
"Now, if there's anything we gays know how to do well, it is to celebrate! Let the joy of this day ring out with PRIDE."