Cynthia Erivo, Nikolaj Coster-Waldau, & Carmen Perez lead the latest round of Social Good Summit speakers

With the 2017 Social Good Summit less than a month away, tickets are going fast and new names are being added to our distinguished lineup every day.

From musical performances to live art installations, we have a lot in store for this year's Summit!

We're excited to announce that among the latest additions to this year’s confirmed speakers are guests you won't want to miss: The Color Purple's Cynthia Erivo, Game of Thrones' Nikolaj Coster-Waldau (Yes, Jamie Lannister himself will be there!), and Women's March Co-Chair Carmen Perez.

As an Emmy, Grammy, and Tony award-winning actress and singer, Erivo has been outspoken about the power using your voice to enact change. Throughout her career, Erivo has been active in the Broadway community, working to inspire conversation and collective action around racial and social justice.

Best known as a member of the villainous Lannister family on Game of Thrones, Nikolaj Coster-Waldau has spent his time offscreen working as a Goodwill Ambassador for the United Nations Development Programme, slaying gender inequality and fighting climate change. Recently, having witnessed the effects of global warming firsthand during filming, Coster-Waldau teamed up with Google to document the impact of global warming in Greenland.

As Executive Director of The Gathering for Justice, Carmen Perez has advocated for many of today's most important civil rights issues. Perez has founded Justice League NYC & CA to address criminal justice at a localized level. Most recently, Perez was appointed National Co-Chair of the Women's March on Washington, which was the largest single-day protest in U.S. history and helped usher in the current resurgence of activism.

On Sunday, Sept. 17, Erivo, Coster-Waldau, and Perez will be joined onstage by a host of other advocates and activists to talk about innovative solutions to global issues throughout the world, including:

• ElsaMarie D'Silva, CEO & Founder of Safecity

• Rocky Duwani, Singer-Songwriter

• Ronald de Jong, Executive Vice President at Philips & Chairman of the Philips Foundation

• Erika Ender, Singer-Songwriter

• Filippo Grandi, United Nations High Commissioner on Refugees

• Kate Hampton, CEO of the Children Investment Fund Foundation

• Munira Khalif, United Nations U.S. Youth Observer

• Rina Kupferschmid-Rojas, Head of Sustainable Finance at UBS & Society

• Rachel Kyte, CEO & Special Representative of the UN Secretary for Sustainable Energy for All

• Dr. Rebecca Martin, Director at the Center for Global Health at the Centers for Disease Control & Prevention

• Peter Maurer, President of the International Committee of the Red Cross

• David Miliband, President & CEO of the International Rescue Committee

• Lawrence O'Donnell, Anchor of MSNBC's The Last Word with Lawrence O'Donnell

• Juliana Rotich, Co-Founder of BRCK & Ushahidi

• Martha Isabel "Pati" Ruiz Corzo, Director of Grupo Ecológico Sierra Gorda I.A.P.

To see the full list of 2017 speakers, visit mashable.com/sgs.

Don't miss this year's Summit IRL at the 92nd Street Y! Get your tickets now!

Members of the press are invited to apply to join the Digital Media Lounge, an area of the summit designated for global journalists and bloggers to cover the conversations and activity happening on site.

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The 2017 Social Good Summit is sponsored by:

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