1. Her parents are heirs of American football fortunes. Her mother’s family founded the Pittsburgh Steelers club, and her father’s – the New York Giants. Mara doesn’t like to mention the family wealth.
2. Rooney’s sister is also an actress. Kate Mara is known from the role of  Zoe in “The House of Cards”.
3. Rooney debuted in 2005, in the film “Urban Legends: Bloody Mary”,  in which her sister Kate starred in the leading role.
4. In “The Social Network” she played the role of Erika Albright, the girl who broke up with Mark Zuckerberg, which was the reason he created Facebook.
5. She’s the founder and president of a charity “Faces of Kibera”, providing shelter, food and health care to orphans in Kenia.
6. She said that if she was to repeat the success of another star, it would be Daniel Day-Lewis.
7. Her first name is Patricia, Rooney is her mother’s family name.
8. Among others, Scarlett Johansson, Ellen Page, Natalie Portman and Jennifer Lawrence were considered for the main part in the film adaptation of the “Millennium” trilogy by the Swedish writer Stieg Larsson, but the role of the dark Lisbeth Salander went to 28-year-old Rooney who was significantly less experienced.
9. During the shooting for “The Girl With The Dragon Tattoo” the actress had to move to Sweden for four months, take up smoking, agree to pierce her body and overcome the fear of riding motorcycles. This role has given her the first Oscar nod.
10. She was close to refusing the part in “Carol”. After having worked on few films in a row she felt exhausted, but finally decided one cannot miss the opportunity to work withh Cate Blanchett. Ultimately, when watching “Carol” we are confused about which actress plays the leading, and which one plays the supporting role.