Karolina Wydra (born on March 5, 1981) is a Polish-American actress and model. She is best known for her television roles as Dominika Petrova in House, the vampire Violet Mazurski in True Blood, detective Dianne Kubek in Wicked City, the alien Izel in Agents of S.H.I.E.L.D., and Zosia in Pluribus. Her film work includes leading parts in After (2012) and the sci-fi thriller Europa Report (2013).