In 2011, Nielsen voice acted for the Danish animated comedy film "Ronal the Barbarian". In 2012, she played in the horror movie "Eldorado". In 2013, she has featured in the short art film "The Key" alongside Ray Stevenson. In 2014, she starred in the science-fiction film "Exodus", in the TV series "Raising Hope", and in the action film "Mercenaries". In 2017, she joined the cast of TV series "Adi Shankar's Gods and Secrets". In 2018, she reprised her role of Ludmilla Drago from "Rocky IV" in "Creed II".