4. She and her sister Kate Mara both appeared in "Best Picture" nominees at the 2011 Oscars.
It should come as no surprise that the daughters of football royalty have a bit of a friendly rivalry happening. The sisters both appeared in Best Picture contenders at this year's Academy Awards. Rooney's older sister Kate Mara, 28, traversed boulders in 127 Hours with James Franco, while Rooney trumped Jesse Eisenberg's ever-awkward character's ego in The Social Network, although neither took home any golden statues.