Stevens was born in Los Angeles, California. She is the daughter of actor and radio announcer Shadoe Stevens, and former model Beverly Cunningham. She has a younger sister named Chyna Rose Stevens. She is a graduate of Beverly Hills High School.
Amber is best known as Ashleigh Howard on the ABC Family series Greek. Stevens also played the role of Mimi Marquez in the musical Rent: Downtown L.A., as a dancer with AIDS and a drug problem who is desperate to find a place to feel safe and protected.
She is currently represented by Nu Talent Agency and Nous Model Management.