Leighton grew up in Fresno, California[3] and she graduated from Clovis West High School.
She also has 11 years of dance experience, which she used in ABC Family's Make It or Break It, where she played a gymnast named Wendy Capshaw.
[7] In June 2015, Leighton was cast to voice Blossom in Cartoon Network's revival of The Powerpuff Girls, which ran from 2016 to 2019.
[8] Leighton's other appearances include roles on several television shows including Pretty Little Liars as Danielle, Grey's Anatomy as patient Sarah Cassidy with Treacher Collins syndrome, 90210 as Alex Scarborough, Criminal Minds as Trish Leake, and as a singing Cactus Kid in Six Feet Under.
which was released by Netflix between 2018 and 2019,[11] and the pollywog Polly Plantar in the Disney Channel animated series Amphibia, which aired from 2019 to 2022.