A California native, Teegarden began her acting career at just ten years old. When she was 16, she was cast in her first television series on the Emmy-nominated Friday Night Lights, playing Julie Taylor, the daughter of a high school head football coach (Kyle Chandler) and a high school guidance counselor (Connie Britton). In 2014, she starred in the science fiction romantic drama series Star-Crossed.
She will soon be seen in the Paramount film Rings, which will be in theaters in the fall of 2016. Her previous film credits include Scream 4, Love and Honor and Disney's Prom.
She is an avid fitness enthusiast, competing in the 2016 Chicago Spartan Race, and she ran a half marathon with Team Nike. She is on the host committee of the ocean conservation organization Oceana and an advocate for No-Kill Los Angeles (NKLA), an initiative of the Best Friends Animal Society to end the overpopulation of dogs and cats in L.A. city shelters.