Erika Kaar is a Polish actress known for her work in film and television. She gained popularity for her role in the historical drama series The Last Kingdom, where she portrayed the character Katherine. Kaar has also appeared in various Polish productions, showcasing her talent and versatility as an actress. In addition to her acting career, Erika Kaar has a background in dance and theater, which has contributed to her performance skills. She has worked on several international projects, expanding her reach beyond Poland and gaining recognition in the entertainment industry.