NURSE BETTY
It's one of the iconic movie moments of the '90s: Renee Zellweger, as Dorothy Boyd, responding to husband Jerry Maguire's declaration of love with a throaty "You had me at hello." It was at that point that audiences everywhere lost it, not just because of the perfection of the line itself, but because Zellweger delivered it with such vulnerability and delicacy that it was emotionally overwhelming; you not only wanted to reach out to her, you wanted to hug her and not let go.