It comes after Leo Varadkar abruptly announced his resignation.
Following a string of affirmations, Mr. Harris declared his candidacy.
“I am ready to step up, and I am ready to serve,” he declared on the news.
I want to express my gratitude to everyone for their confidence and support. I will work on it day and night since it means so much to me. To earn back that faith, I will put everything I have into this.”
In addition, he stated that he wished to contribute “energy and an enthusiasm” to the party’s leadership.
Mr. Harris paid respects to the departing Taoiseach in a statement.
“Leo has guided our party and our nation through extremely difficult times, such as Brexit, the COVID-19 pandemic, and the recent cost of living crisis,” the speaker stated.
“If given the opportunity, I will give this my all.”
At 37 years old, Mr. Harris would surpass his predecessor as the youngest Taoiseach in the nation’s history if he were to succeed Mr. Varadkar.
On Thursday afternoon, state minister Jennifer Carroll MacNeill and social protection minister Heather Humphreys also disqualified themselves, making room for Mr. Harris.