Leah McNamara is an Irish actress. She started her professional acting career in the 2010s, first appearing in an episode of Jack Taylor. Years later, she made her film debut in Cherry Tree. In 2017, she had a role in the movie Nails. That same year, she became known for her recurring character as Aud in Vikings. She then had performances in the feature films Cellar Door and Metal Heart. More recently, McNamara gained wider recognition for her role as Rosalind Devlin in the BBC One series Dublin Murders, which she has been starring in since 2019. The actress will also star in the upcoming series Normal People.