Beyonce put her own spin on the issue, sharing a hand-written message alluding to her popular song "Single Ladies" that says, "If you like it, you should be able to put a ring on it. #WeWillUniteForMarriageEquality"
Companies are also publicly supporting gay marriage.
NPR reported that nearly 300 businesses signed on to a brief asking the high court to strike down the Defense of Marriage Act (DOMA).
Bud Light posted a picture to its Facebook page with two beer cans making the equal sign.
The Supreme Court examined DOMA and federal benefits for gay Americans Wednesday.