If you feel like heading out, check out other movies in theaters. This stint catapulted her to stardom, and turned out to be her breakthrough success. Kate Mulgrew Celebrity Profile - Check out the latest Kate Mulgrew photo gallery, biography, pics, pictures, interviews, news, forums and blogs at Rotten Tomatoes! Kate Mulgrew is an American actress best known for her starring role in the hit Netflix series ‘Orange is the New Black’. She started her career in the mid 70s with the daily soap ‘Ryan’s Hope’. Kate Mulgrew doesn't have any movies playing in theaters. Kate Mulgrew full list of movies and tv shows in theaters, in production and upcoming films.