Aria Montgomery. Many can tell you that Lucy Hale is the actress who plays this well-known character on Pretty Little Liars. But what about her life beyond the. Karen Lucille Hale is an American actress and singer. Early in her career, she was sometimes referred to as Lucy Kate Hale. She is best known for her role as Aria Montgomery on the Freeform series Pretty Little Liars (–).Other names: Lucy Kate Hale.