Eighteen-year-old high school student Kyle Chalmers has won Australia's fifth gold in Rio, taking out the 100-metre freestyle.
The young star swam an incredible race, coming from seventh at the 50-metre mark to take out gold with a time of 47.58.
Australian Cameron McEvoy, who was tipped to win a medal, finished seventh.
And Australia was loving it.
PANDEMONIUM!!! GOLD FOR CHALMERS
South Australians love a gold medal. Well done kid! Everyone at home super proud! #KingKyle @AUSOlympicTeam @7olympics
Chalmers our first men's 100m freestyle Olympic champ since 1968. Great result.#Rio2016
It's the first time an Aussie has won the event in 50 years. Onya Kyle. Onya Kyle.
Wow, Kyle Chalmers is Australia's first 100m free champ in almost 50 years (Michael Wenden). Congratulations Kyle #SpeedTakes #Olympics
And his grandparents were as proud as punch.
The moment Kyle Chalmers' proud grandparents watched him win the Gold medal for 100m freestyle. #Rio2016
The victory came just minutes after Australia's Maddie Groves won silver in the 200-metre butterfly, and shortly before Australia won silver in the women's 4x200 freestyle.
Onya Kyle.
Australian pride doesn't have to end when the Olympics do! Sign up for our "Meanwhile in Australia" newsletter and we'll send you a weekly roundup of the craziest, most hilarious, and most awesomely Aussie things around.
If you can't see the signup box above, just go here to sign up!