Joining a host of other recent gongs for his role in Beginners, Plummer last night became the oldest ever actor to win an Academy Award. At 82, he's just two years younger than Oscar himself, and his recognition felt long overdue.
To mark his magnificent achievement, we've scrabbled around for ten quick facts about one of the finest actors of our time.
1. Christopher Plummer was born Arthur Christopher Orme Plummer in Toronto, Canada on December 13, 1929 to dad John Orme and mum Isabella Mary.
His parents split soon after he was born, and Christopher later said: "The first time my father saw me in the flesh was on the stage, which is a bit weird. We went out to dinner, and he was charming and sweet, but I did all the talking."
2. In his early years, Christopher trained to be a concert pianist, but he shifted to acting after being inspired by Laurence Oliver's take on the Bard's Henry V in 1944.
3. After starring in countless plays with the Canadian Repetory Theatre and the Bermuda Repetory Theatre, Chris made his Broadway debut in The Starcross Story in January 1953. The show was a massive flop which closed on its opening night, which only goes to show that you shouldn't get downhearted by early setbacks.
4. He has continued to work on the stage in the years since, in the US, UK and elsewhere, winning Tony Awards in 1976 for 'Best Leading Actor in a Musical' for Cyrano and 'Best Performance by a Leading Actor in a Play' in 1997 in Barrymore.
Things really went stellar when Sidney Lumet cast him 1948's Star Struck, the same year he appeared in Nicholas Ray's Wind Across the Everglades. Then came a six-year gap from the pictures, before a return with The Fall of the Roman Empire and a little film called The Sound of Music.
5. Adjusting for inflation, The Sound of Music is the third-top grossing film of all time (behind Gone With The Wind and Star Wars). Christopher was reported to have considered walking away when there was talk of dubbing his voice with that of a singer. They let him give it a go, and his voice stayed, including on Oscar Hammerstein's last ever song, the heartbreaking 'Edelweiss'.
6. He's had a mixed relationship with the role of Captain Von Trapp since, claiming to be "bored" of the character and suggesting that the endless fascination with the man was "like flogging a dead horse". He bailed on the 40th anniversary cast reunion but his feeling softened enough by 2010 for him to attend a bash for the 45th.
"There's a whole new generation every year - poor kids - that have to sit through it," he joked. "But it was a very well-made movie, and it's a family movie and we haven't seen a family movie, I don't think, on that scale for ages. I don't mind that. It just happened to be not my particular cup of tea."
7. Since then he's been in everything from The Man Who Would Be King and Pixar animation Up to The Girl with the Dragon Tattoo, but turned down the role of Gandalf in the Lord of the Rings trilogy, a decision he admits to regretting, He even referred to himself as a "stupid bugger" for letting Sir Ian McKellen get the job.
8. Christopher played General Chang in Star Trek VI: The Undiscovered Country in 1991. William Shatner in fact got a big break when understudying for Plummer at the Stratford Shakespeare Festival way back when, being forced to take the stage when Christopher fell ill.
9. Passing on the baton, Christopher's daughter Amanda Plummer is also an accomplished actor, playing Yolanda in Quentin Tarantino's Pulp Fiction. In 2005 they were both up for Emmys. She won for her role as Miranda Cole in an episode of Law & Order: Special Victims Unit, while Christopher was left empty-handed, missing out in his category to fellow veteran Paul Newman.
10. Don't expect his Oscar win to signal the end of his career. "I'm insatiably ambitious," Plummer told The Daily Telegraph a couple of years ago. "A lot of people want to retire; I couldn't. You don't retire in our business. What, play golf and watch television? Oh please.
"There's not that many old actors. They all died. I'm one of the last men standing! I think there's maybe four of us. I hope those other b**tards die first."
More from the Oscars 2012:
> Oscars 2012: 'The Artist', 'Hugo' win five Academy Awards
> Oscars 2012: 84th Academy Awards live blog
> Oscars 2012: Academy Awards winners list in full
> Oscars: Academy Awards 2012: Red carpet pictures
Move through our Academy Awards red carpet gallery below: