Orla Comerford finished fourth of five runners in heat 2 of the T13 100m - but that was enough to make Sunday's final as a fastest loser.
The Raheny Shamrocks sprinter clocked a PB of 12.81 to squeak through and will go to the blocks at 3.0 tomorrow afternoon dreaming of a podium finish.
"I was a little bit disappointed with the time, but I'm delighted I made a final, that was my aim," the teenager, who turns 19 on Wednesday, told RTÉ Sport.
"It's such an honour, such an exciting experience. I'm just really chuffed to make the final."
Comerford also took the opportunity to hail the support in the stands. An almost full stadium provided a cracking atmosphere for both heats, and the Irishwoman said it made for a even greater spectacle.
"It's fantastic, an amazing atmosphere. the crowds are brilliant, they're full of life. It's great.
"I'm now just going to lay back, relax and take things easy, let the body recover. Hopefully I can run a little faster tomorrow!"