"You're only two years older than me, darling; where have you been all my life?" Plummer said while accepting the award. With wins at the Golden Globes, Screen Actors Guild Awards and even the Independent Spirit Awards, Plummer was the odds-on choice to take home the trophy.
The venerable actor -- who starred in everything from "The Sound of Music" to "Up" before scoring Oscar gold by playing a terminally sick man who recently came out as homosexual in "Beginners" -- defeated fellow old-timer Max Von Sydow ("Extremely Loud and Incredibly Close"), Nick Nolte ("Warrior"), Kenneth Branagh ("My Week With Marilyn") and Jonah Hill ("Moneyball") in the category.
His only other Oscar nomination came in 2009, when he was up for Best Supporting Actor after playing Tolstoy in "The Last Station."