Grant completed his primary education from Granby High School. Grant completed his graduation from Granby High School in 2008 After that, he also joined Governor's School of Arts and graduated his college level studies from there. Grant was raised in Norfolk, Virginia along with his two siblings Gracie Gustin and Tyler Gustin. Grant started his acting career with an Exercise Video in 2003.
Moreover, Grant made his acting debut by starring the role of Club Fit kid in the movie, Kid Fitness Jungle Adventure Exercise Video. Grant again appeared in the TV series "A Haunting" in 2006 which gave him a big hit. His breakthrough role came in 2011 after he portrayed the role of Sebastian Smythe on the Fox series "Glee". While he was in school he appeared in the Broadway show "West Side Story".
Regarding his nationality and ethnicity, Grant is a white American of 27 years. Grant has an affair with his girlfriend, Hannah Douglass. As per the report, they are dating each other since 2014 and are going to get married soon. A major part of his income comes from his acting career inclusive of his musical career which includes his salary and a small share of TRP's collection from hit series The Flash which is successfully running in its third season. His net worth is estimated to be about U.S $ 1.4 million.