Kiersey Nicole Clemons (born December 17, 1993) is an American actress and singer known for her role in the 2015 comedy-drama film Dope, playing Cassandra "Diggy" Andrews. She has also co-starred in several other films such as Neighbors 2: Sorority Rising (2016), Flatliners (2017), Hearts Beat Loud (2018), and Zack Snyder's Justice League (2021) and The Flash (2023). Clemons cut her teeth in a number of TV shows, including recurring roles in Austin & Ally (2013), Transparent (2014–2015), Extant (2015), and Easy (2016–2019). She had a main role in the final season of the comedy series Angie Tribeca (2018).

Born in Pensacola, Florida, she moved and grew up in Redondo Beach, California. Clemons is biracial, of African-American and white heritage. Her career began by co-starring in the Disney Channel series Austin & Ally as Kira Starr. She later crossed paths with the crime-drama series CSI: Crime Scene Investigation and guest-starred in a 2015 episode of New Girl. In 2016, Clemons was cast as Iris West in the action film The Flash, but due to certain complications, the movie was delayed. Nevertheless, her scenes were eventually released in Zack Snyder's Justice League in 2021. Off screen, Clemons identifies as queer and is in a relationship with Ebony De La Haye, an Australian stunt double. She is open about her experiences with bipolar disorder.