While studying for her degree in English and creative writing at UCLA,[4] she was cast in the NBC Saturday morning program Just Deal co-starring as Ashley "Ash" Gordon.
Within the same year, she guest starred on episode of Angel as well as getting the lead role in the 2005 short film Smile for the Camera.
[4] Thormahlen also created, wrote and produced[2] a TV pilot for kids focusing on food and nutrition called, What's Cooking with Waffles and Mousemeat.
[5] The puppet show also features a human cast including Simon Helberg, Jason Ritter and a guest interview with Maroon 5.
[6] In 2021, she and Jeremy Konner co-created a version of the original food-focused show with puppets called Waffles + Mochi [7] on Netflix.