Lady Mary Crawley is a fictional character from the British television series Downton Abbey. She is the eldest daughter of the Crawley family and is known for her strong-willed and independent nature. Set in the early 20th century, her character navigates the challenges of aristocratic life, including issues of love, marriage, and inheritance. Throughout the series, Lady Mary experiences significant personal growth and faces various societal expectations. Her relationships with family members, particularly her father, Robert Crawley, and her sisters, Edith and Sybil, play a crucial role in her development. Lady Mary is portrayed by actress Michelle Dockery.