Prominent Hollywood actresses Kate Mara and Rooney Mara come from a famous multi-generational sports family with direct ownership roots in two historic National Football League franchises. Their mother's side of the family belongs to the Rooney dynasty, which founded and still maintains controlling ownership of the Pittsburgh Steelers. Meanwhile, their father's side of the family traces its heritage back to Timothy Mara, who founded the New York Giants in 1925. This unique genealogical background makes the Mara sisters true royalty of professional football, uniting two of the oldest and most storied ownership families in league history.