Born in California, Emily is the youngest daughter of the Tennis star, John McEnroe. Her mother is an American actress and author, Tatum O'Neal. Emily has two brothers, Kevin McEnroe, a writer, and Sean McEnroe, a fine art photographer. She grew up struggling with her drug addict mother when her father had left them and married another wife. Her whole family tree is said to be cursed with drugs as her grandparents struggled with pills too.
In spite of going through a lot of pain, Emily seems to be strong with all of her family. She firstly started working as a babysitter and she is trying to get into acting. She feels proud to be a part of her family whose story is inspirational to many people. There is no information about her personal life about her affairs or relationships. It seems like Emily likes to keep her private life to herself.