A third young girl died early Tuesday from the previous day’s mass stabbing at a Taylor Swift-themed dance event in the UK.

The 9-year-old girl — identified by friends and family as Alice Aguiar — “died in hospital in the early hours of this morning,” Merseyside Police said.

The other two victims who died Monday were also little girls, ages 6 and 7, police revealed. 

Eight other children suffered from stab wounds in the attack, including five who remain in critical condition.

Two adults are also in critical condition from being attacked while trying to save the children, police have said.

An unidentified 17-year-old suspect is still being interviewed by cops, who have yet to offer a possible motive but say the attack it is not thought to be terror-related. 

Witnesses said the teenager wore a “black hood” when he entered the Hart Space in Southport, just outside Liverpool, during their advertised “morning of Taylor Swift-themed yoga, dance and bracelet making.”

At least 25 children from the ages of 6 to 11 were at the event when the brutal attack unfolded — with the knifeman reportedly pulling up in a taxi, witnesses said.

Officers called to the scene “were shocked to find that multiple people, many of whom were children, had been subjected to a ferocious attack and had serious injuries,” Merseyside Police Chief Constable Serena Kennedy said.

Swift said early Tuesday that she was “completely in shock” at the deadly attack.

“The horror of yesterday’s attack in Southport is washing over me continuously and I’m just completely in shock,” the pop superstar wrote to fans. 

“These were just little kids at a dance class,” the “Love Story” singer said of the 11 children stabbed, three of whom died and five still fighting for their lives.

“The loss of life and innocence and the horrendous trauma inflicted on everyone who was there,” she said, adding, “I am at a complete loss for how to ever convey my sympathies to their families.”