During that time, she also attended a three-month method acting workshop at the Actors Studio in New York City.

From November 2013 to 2016, she played the leading female role in the ZDF series Herzensbrecher – Vater von vier Söhnen.

[2] Between 2015 and 2019, Ernst played the lead role as Commissioner Elena Lange along with Tom Beck in the Sat.1 series Einstein.

[3] She also played the senior public prosecutor Kirsten Grambach-Wachta alongside Bert Tischendorf in the RTL series Beck is back!

[4] Since 2021 she has appeared alongside Hans Sigl and Mark Keller in the ZDF series Der Bergdoktor as the surgeon Dr. Johanna Rüdiger[5] as well as in Kanzlei Berger on the same channel.