John Joe Nevin is through to the Olympic bantamweight final after beating Cuba's reigning world champion Lazaro Alvarez Estrada 19-14.
Nevin won all three rounds at the ExCeL Arena, taking the first 5-3, the second 7-6 and the final round 7-5.
The Mullingar boxer will fight Britain's Luke Campbell in the final tomorrow night at 8.45pm.
Around 1,500 people crowded into the Market Square in Mullingar this afternoon to watch Nevin’s fight on a big screen.
There was a carnival atmosphere as some businesses closed up for a couple of hours to watch the fight.
The big screen will be moved to the car park of the Harbour Place shopping centre for tomorrow night's final.
A number of family members of John Joe Nevin said that they were refused entry to some licensed premises in Mullingar today to watch his semi-final fight.
They said they were extremely upset and felt they were discriminated against on a day that brought such joy to the town.
They are hoping the matter will be resolved in time for John Joe's final fight tomorrow.
Earlier, China’s Zou Shiming beat Paddy Barnes on a countback in their light flyweight semi-final.
The bout was scored 15-15 after Barnes won the final round 7-4, but after a countback Zou was determined to have won 45-44.
Zou led Barnes 8-5 after the first round and 11-8 after round two.
Barnes wins a bronze medal, repeating his achievement at the Beijing Olympics in 2008.
Tonight, Cuba’s Robeisy Ramirez Carrazana beat Michael Conlan 20-10 in their Olympic flyweight semi-final.
The Cuban won the first round 6-3 and the second round 4-3.
Conlan was left with too much to do in the final round, and Carranza won it 10-4.
The women's 4 x 400m relay team came sixth and did not progress in their heat at the Olympic Stadium.
This morning, Team Ireland's Andrzej Jezierski failed to reach the 200m Canoe Sprint final.
The Polish-born competitor was fourth in his semi-final.
Meanwhile, a triumphant homecoming is being organised for Katie Taylor.
Bray Town Council said an open top bus parade and a fireworks display will take place in Taylor's hometown on Monday.
Thousands are expected to turn out to welcome home the 26-year-old boxing champion who overcame Russia's Sofya Ochigava 10-8 in the women's lightweight final yesterday.
Katie Taylor 'born for greatness'
Taylor's brother Peter said her family always believed in her.
He said: "All our of destinies seemed to be wrapped up in this as a family. We always knew that there was something special about Katie when she was younger.
"She was born for greatness. She was born for this moment. Just to see it fulfilled yesterday was amazing."
Dublin Airport is putting plans in place to deal with the thousands of people expected to turn up to welcome Team Ireland home.
With five medals guaranteed, it will be the most successful Irish team since 1956.
President Michael D Higgins has invited members of the Olympic team to a reception at Áras an Uachtaráin next month.
No date has been set for the reception, but it is understood that the Olympic Council of Ireland has already accepted the invitation.