Fintan McCarthy and Paul O’Donovan's Olympic gold medal win will "inspire generations to come" to take up rowing, the Taoiseach says.
He said it's a "marvellous, marvellous occasion" and a proud moment for the two rowers, Ireland and the people of Cork.
The two Skibbereen rowers won the lightweight men's double sculls rowing final in Tokyo overnight.
It's the first gold medal the country has ever won in rowing, and follows the bronze won by the women's four team yesterday.
President Michael D Higgins called the gold medal win a "tremendous achievement".
On Newstalk Breakfast, Taoiseach Micheál Martin said it's a "fantastic achievement for the two lads - for Paul, Fintan and their families".
He said: “They were tagged as favourites going in, which can be very difficult. They held their nerve and were psychologically brilliant.
“I think this will inspire generations to come to go on the water and engage in rowing as a great sport."
Mr Martin said the "extraordinary commitment young people put into sport today is something to behold".
He said Ireland has made a "substantive investment" in sports in recent decades, but more does need to be done.
The Taoiseach praised every Irish athlete taking part in this year's Olympics in Tokyo.
He said: "They can't all win medals - it's a wonderful achievement to be in the Olympics and to represent your country.
"If you don't win a medal, it's something we should celebrate - to urge and encourage people to do their very best."