Nazanin Boniadi (/ˈnɑːzəniːn ˈboʊnjɑːdi/; [nɑːzæˈniːn bonjɑːˈdiː]; born 1980) is a British actress and activist. Born in Tehran and raised in London, she attended university in the United States, where she landed her first major acting role as Leyla Mir in the soap opera General Hospital (2007–2009) and its spin-off General Hospital: Night Shift (2007). Since then, Boniadi has played Nora in the sitcom How I Met Your Mother (2011), Fara Sherazi in the spy thriller series Homeland (2013–2014), Esther in the historical drama film Ben-Hur (2016), Clare Quayle in the sci-fi thriller series Counterpart (2017–2018), Zahra Kashani in the action thriller film Hotel Mumbai (2018), and Bronwyn in the first season of the fantasy series The Lord of the Rings: The Rings of Power (2022).
She was an Amnesty International spokesperson from 2009 to 2015 and served as a board member for the Center for Human Rights in Iran from October 2015 until February 2021. Her focus has been on youth and women's rights.