Sage is a recent graduate of NYU Tisch, where she studied musical theater and film acting. She discovered her love for acting at age 5, doing school and community theater. At age 14, she signed with a manager and began acting professionally. She has appeared in several commercials and print ads, as well as Nurse Jackie (2009), Blue Bloods (2010) and Sitting on Babies (2012). Sage is of Filipino, Irish and German heritage. She is a singer, actor and dancer, as well as a prolific writer.