Born in Allentown, Pennsylvania, Leslie studied ballet at the Pennsylvania Youth Ballet and acting at the Pennsylvania Youth Theatre. She danced professionally as a teenager with the Lehigh Valley Ballet, while also attending the Allentown Arts Academy for Theatre and Dance. Leslie continued her education at New York University's Tisch School for the Performing Arts. She also studied acting at the Lee Strasberg School in New York City and dance at Broadway Dance Center. Leslie moved to Los Angeles and began her acting career in television and film with shows such as "Numb3ers" and J.J. Abrams "Star Trek".
