She has an older brother, Frankie Grande (aka Frankie James Grande), who is 11 years older than her. He's also a performer and producer, and went on tour with her as one of her dancers.
She is a natural brunette. Dyed her hair velvet red for the role of Cat Valentine on Victorious (2010) because the rest of the cast were brunette. Creator/executive producer Dan Schneider didn't want everyone to have brown hair.
She is best friends with her Victorious (2010) co-star Elizabeth Gillies. They've known each other since they starred in 13 (musical) on Broadway back in 2008.
She is hypoglycemic and hyperactive.
Attended Pine Crest School and North Broward Preparatory School in Boca Raton.