Sierra is now aged 22 years old. She has a normal height. She has two lovely sisters who are also actresses. She has black ethnicity. Till date there is no any information about her love affairs.
Sierra is a talented girl since her childhood days. She made her acting debut in 2005 by starring the role of Sue in The Gospel. She collaborated with her sisters China Anne McClain and Lauryn McClain and together they formed an American Pop and R&B girl group McClain. It was previously named as 3McClainGirls and McClain Sisters. They were influenced in music after watching their songs and musical videos. In 2005, they also released their promotional songs titled Silly Games. Their debut single Go was released on 6th of November 2012 and their second song He Loves Me was released in 2014. Her net worth is unknown.