Cynthia Addai-Robinson is an accomplished American actress best known for her commanding performances across both television and streaming platforms, most notably as the fierce Naevia in the Starz series Spartacus, the formidable DC Comics character Amanda Waller in The CW's Arrow, and currently as the regal Queen Tar-Míriel in the Amazon Prime Video epic The Lord of the Rings: The Rings of Power. Born on January 12, 1985, in London, England, to a Ghanaian mother and an American father, Addai-Robinson moved to the United States at a young age and was raised in the Washington, D.C., area. She developed an early passion for acting, which led her to pursue a degree in theater from New York University's Tisch School of the Arts, where she honed her craft before making her professional debut.

Addai-Robinson's career began with guest roles on popular television series, including appearances on Law & Order: Criminal Intent and CSI: Miami, which helped establish her as a versatile performer. Her breakout role came in 2010 when she joined the cast of Spartacus as Naevia, a slave who evolves into a warrior, a part she played across multiple seasons including the prequel Spartacus: Gods of the Arena. This role showcased her ability to bring depth and strength to complex characters, earning her recognition from both audiences and critics. Following her success in ancient Rome, she transitioned to the modern superhero genre, stepping into the shoes of Amanda Waller in The CW's Arrow and later in The Flash and DC's Legends of Tomorrow, where her portrayal of the tough, no-nonsense government operative became a fan favorite.

From 2016 to 2018, Addai-Robinson took on the role of Nadine Memphis in the USA Network drama Shooter, starring opposite Ryan Phillippe. Her performance as a dedicated FBI agent added another layer to her resume of strong, authoritative women. She also appeared in films such as Columbus Circle and The Accountant, the latter starring alongside Ben Affleck, further demonstrating her range in both television and cinema. In 2022, she landed her most high-profile role to date as Tar-Míriel, the queen regent of Númenor, in The Lord of the Rings: The Rings of Power, Amazon's ambitious adaptation of J.R.R. Tolkien's legendarium. Her portrayal of a ruler caught between duty and prophecy has been praised for its emotional nuance and regal presence, solidifying her status as a leading talent in the fantasy genre. Off screen, Addai-Robinson is known for her advocacy for diversity in the entertainment industry and continues to take on roles that challenge stereotypes, making her a respected figure in Hollywood.