Kare lives with his mother, father and sister in the outskirts of Stockholm, Sweden. He attends Adolf Fredrik's School of Music, the oldest specialized elementary school in Sweden. In 2008 Kare starred in his first feature film "Let the Right One In". Before that he played the title role in a theatrical production of one of Astrid Lindgren's children's books. He enjoys reading comic books and playing the piano and guitar in his free time.