- Julianna Margulies
- Narrator
- Ron Suny
- Self
- Peter Balakian
- Self
- Elizabeth Frierson
- Self
- Vahakn Dadrian
- Self - Zoryan Institute
- Taner Akçam
- Self
- Fatma Müge Göcek
- Self
- Fikret Adanir
- Self
- Tessa Hofmann
- Self
- Halil Berktay
- Self
- Ara Sarafian
- Self
- Samantha Power
- Self
- Ragib Zarakolu
- Self - Publisher
- Israel Carmy
- Self
- Orlando Bloom
- Auguste Berneau
- Anandah Carter
- Additional Narration
- David Grillo
- Enver Pasha
- Ed Harris
- US Consul Leslie Davis
- Jared Leto
- (voice)
- Laura Linney
- Maria Jacobsen
- Tom Mardirosian
- (voice)
- Josh Mosby
- (voice)
- Natalie Portman
- Aurora Mardiganian
- Paul Rudd
- (voice)
- Nick Zelletz
- Turkish Strength Society
- Louis Zorich
- (voice)
- Raphael Lemkin
- Self
