Katharine Hepburn in Woman of the Year (1942)
Many similarities can be drawn between Katharine Hepburn and her character Tess Harding, a fiercely determined political journalist whose liberated by her feminist ideals. She develops a battle-of-the-sexes dynamic with a male colleague (Spencer Tracy) whom she ends up falling in love and navigating a marriage with. The chemistry between Hepburn and Tracy is palpable throughout the film and marks the beginning of their scandalous 26-year off-screen relationship. They went on to make eight more films together.