The winner for Best Supporting actress got up on stage and said, "It's our time to have wage equality once and for all and equal rights for women."
She continued discussing the topic backstage.
"The truth is, the older women get, the less money they make," she said. "It is time for us. Equal means equal."
On Twitter Monday, the "Boyhood" star, 46, wasn't backing down.
"I don't care if people are pissed. The truth is that wage inequality adversely effects [sic] women," she wrote. "If you are fighting against #Equalpay you are fighting for ALL women and especially women of color to make less money than men."
She added, "Wage equality will help ALL women of all races in America. It will also help their children and society."
As for people who questioned whether she herself makes less money since she is an actress, she wrote, "My children are not living below the poverty line. That doesn't mean I don't care about the kids who are. DO YOU? Then help their moms."
Today, she added, "Don't talk to me about privilege. As a kid I lived well below the poverty line. No matter where I am I won't forget women's struggle."
Don't talk to me about privilege. As a kid I lived well below the poverty line. No matter where I am I won't forget women's struggle.— Patricia Arquette (@PattyArquette) February 24, 2015
I was a working single mom at 20. I know how hard it is to pay for diapers and food .Explain why women should be paid less?— Patricia Arquette (@PattyArquette) February 24, 2015
Then, she added, "The working poor women of this country have been asking for help for decades. If I have "privilege" or a voice I will shine a light on them."