Cate Blanchett was nominated for an Academy Award.
The Academy Award for Best Supporting Actress is an award presented annually by the Academy of Motion Picture Arts and Sciences ( AMPAS ) . Cate Blanchett . Her portrayal of Katharine Hepburn in Martin Scorsese 's 2004 film The Aviator brought her critical acclaim and many accolades , including the Academy Award for Best Actress in a Supporting Role , making her the only actor to win an Oscar for portraying another Oscar-winning actor .