1. Meryl Streep — 1979
Age: 29
Nominee: Actress in a Supporting Role, The Deer Hunter
#Fact: After her first win, Meryl would eventually be nominated 19 more times, and win two more Oscars. As of now, she is the most nominated actor in history. That being said, Katharine Hepburn still holds the highest number of Oscar wins (four of them), compared with Meryl's three. This year she's nominated for Actress in a Leading Role for Florence Foster Jenkins.