Lawmakers had set up a debate and impeachment trial late Thursday in the 130-member unicameral Congress after voting to accept four requests for a vote to remove Boluarte from office over what they said was her government's inability to stem crime.
They requested that Boluarte come before them shortly before midnight to defend herself, but when she did not appear they immediately voted to oust her.
In short order, 124 lawmakers voted just past midnight to impeach Boluarte. There were no votes against the effort.
The shocking turn of events came just hours after a shooting at a concert in the capital inflamed anger over crime roiling the country.
Unlike eight previous attempts to remove Boluarte, almost all legislative factions expressed support for the latest requests.
Boluarte, Peru's first female president, took office in December 2022 after Parliament used the same mechanism to impeach her predecessor.
After Friday's vote, Boluarte spoke on national television, recounting her administration's achievements.
"I have not thought of myself, but rather of Peruvians," she said.
Minutes into her speech, the broadcast was interrupted to show Jerí's swearing in.
Jeri, the president of the Congress, was sworn in early on Friday as the interim president to serve out Boluarte's term.
Elections are scheduled for next April and Boluarte's term was to end in July 2026.
Jeri said he would defend Peru's sovereignty and hand over power to the winner of the April election.
Boluarte was Peru's sixth leader in just under a decade. A normal presidential term is five years.
She assumed power in Peru in 2022 to complete the term of then-President Pedro Castillo, who was removed from office just two years into his five-year term after attempting to dissolve the legislature to avoid his own removal.
She had served as Castillo's vice-president before becoming president.
There were more than 500 protests demanding her resignation in the first three months of her presidency.
Plagued by scandals, her administration's inability to address Peru's incessant crime proved to be her undoing.
On Wednesday, she partially blamed the situation on immigrants living in the country illegally.
Official figures show that 6041 people were killed between January and mid-August, the highest number during the same period since 2017.
Meanwhile, extortion complaints totalled 15,989 between January and July, a 28 per cent increase compared with the same period in 2024.
The country's latest presidential crisis erupted after a man opened fire and injured five people Wednesday during a concert of Peru's most popular cumbia groups, Agua Marina.
Prime Minister Eduardo Arana on Thursday defended Boluarte during a crime-focused hearing before Congress, but it was not enough to dissuade lawmakers from pursuing the motions to see the president out of office.
"Parliament's concerns are not resolved by addressing a request for impeachment, much less by approving it," Arana told lawmakers.
"We are not clinging to our positions. We are here, and we knew from the beginning that our first day here could also be our last day in office."
