Australia's men's kayak four led all the way to seal the team's sixth gold medal in London in the canoe sprint competition at Eton Dorney.
Tate Smith, Dave Smith, Murray Stewart and Jacob Clear rowed the perfect race to win the K4 1000m from Hungary and the Czech Republic.
"We had our best (form), we knew we would be right up there and it was just awesome from the start," Tate Smith said.
"We just dug deep and brought it home. It was just perfect.
"We've been able to put four good guys together. We were close in Beijing, and were really close in K4s, but we have just worked really hard - it's been our focus and our priority.
"We knew we could do it. We had this belief for the last three years and it's the biggest race of our life. It's unbelievable."
The Australians were the fastest crew in qualifying, and they took up where they left off in the final.
The K4 crew led at the 250m mark from Hungary, then maintained a small lead at the half-way point of less than one-tenth of a second.
The third leg saw the Australians pull away, to establish a 0.61 second advantage coming into the final stage of the race, and despite a wall of boats trying furiously to take the gold away, they held that 0.61 gap to the finish.
Australia stopped the clock in two minutes 55.085 seconds, with Hungary in 2:55.699 and Czech Republic in 2:55.850.
Earlier, Alex Haas and Jake Donaghey came third in the B Final of the men's C2 1000m event.