Protesters in support of LGBTQ rights rallied outside the Supreme Court on Tuesday as the high court heard arguments in several cases dealing with discrimination based on sexual orientation and gender identity.

Actress Laverne Cox joined the demonstration, calling on lawmakers to pass legislation to protect LGBTQ people if the Supreme Court doesn’t rule in their favor. According to a spokesperson for U.S. Capitol Police, 133 individuals were arrested for unlawfully demonstrating.

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Chris Marquette contributed to this report.