In the moment, which she called "terrifying," Streep spoke about the grit and grace needed to become the first female to accomplish something in any field, while giving Hillary Clinton her full endorsement.
"It was a moment in history. I really did feel the press of that," Streep told ET. "Think of it: 240 years we have been citizens, but only 100 years since we could vote and now the first female candidate for the presidency. I felt my grandmother's ghost accompanying me out there and my mother's and felt my daughter's pride. It was one for the whole team."
In her new film, Florence Foster Jenkins, Streep takes one for the team in a different way, as the Oscar winner -- a talented singer in real life -- has to sing badly for the role.
The biopic tells the true story of a New York heiress who did everything in her power to become an opera singer despite her terrible voice. But, no one around her had the heart to give her an honest critique of her talent or lack thereof.