In honor, celebration, and support of International Women’s Day today, celebrities have banded together to advocate for gender equality.

Signing a letter from Global Citizen—who joined forced with Chime for Change to “strengthen the voices speaking out for girls and women around the world”—were entertainers including Chime for Change co-founders Beyoncé and Salma Hayek, as well as John Legend, Madonna, Jada Pinkett-Smith, Coldplay, Julia Roberts, and more.

Denouncing “recent legislation and rhetoric [that] have put decades of progress for girls and women at risk,” the celebrities ask for readers to join their fight, draw attention to transgressions, and celebrate those who are already paving the way.

Read the letter below.

We have reached a critical moment in history. Recent legislation and rhetoric have put decades of progress for girls and women at risk.

In 2013, we joined with CHIME FOR CHANGE to convene, unite and strengthen the voices speaking out for girls and women around the world. Today, we find ourselves under threat of seeing a generation’s worth of hard-won gains reversed.

All over the world, women are on the frontlines fighting for our future. Yet millions of girls and women are still denied basic equal rights. And recent policies and appointments in the United States jeopardize its position as a global leader and positive role model on human rights.

We stand together to say, in a voice louder than ever, that fighting for gender equality is the emergency and the opportunity of our time.

With every generation, our story has spread wider, become more familiar. The voices telling it braver, more powerful. But our story is far from over.

This is about hearing a call – to join us wherever you are. About raising an alarm – drawing attention where there is work to be done. And about celebrating – those who are already showing us, against impossible odds, what is possible.

We believe that connection empowers us. That every voice matters. That each one of us is needed to achieve change. We believe we can do extraordinary things when we come together.

We fight for education. For health. For justice. For every girl. Every woman. Everywhere. We fight for our future. Because none of us can move forward if half of us are held back.