Katherine Grace McNamara is an American actress and singer. She began her acting career on Broadway, appearing in A Little Night Music. After graduating high school at the young age of 14, she continued to act and also graduated summa cum laude with a Bachelor of Science degree in Business Administration from Drexel University at the age of 17. You can now see her on the Freeform series Shadowhunters, on The CW series Arrow, and There You'll Find Me in 2020.