Sierra Aylina McClain (born March 16, 1994) is an American actress and singer. As an actress, she was first recognized for her role as Sierra in Daddy's Little Girls (2007). She had her breakthrough as Nessa Parker in Empire (2016–2018), and is also best known for starring as Tanya Clifton in the television series Mindhunter (2019). Her film roles have included starring as Tosha in the films Honey: Rise Up and Dance (2018), and as Carina in Shrink (2009). She is currently starring as Grace Ryder in 9-1-1: Lone Star (2020–present).

As a singer, she is best known as a member of the sister brother group Thriii with her sisters.

Early life
Sierra Aylina McClain was born on March 16, 1994, in Decatur, Georgia. Her father, Michael McClain, is a music producer who produced Solange Knowles' debut album Solo Star (2002). Her mother, Shontell, is a songwriter and former screenwriter. She has two younger sisters, Lauryn and China Anne, who are also actresses and singers, and has a younger brother, Gabriel.