The Duke and Duchess of Sussex were driven around and guarded by the security detail, including a former NYPD officer who is also Swift's head of security.
A tall, balding man in his 50s known as Jimmy, who was seen watching over the couple this weekend, has dealt with stalkers and intruders who made their way into the singer's apartment in the past.
Another guard, who is shorter, burlier, and in his 40s, has also been seen guarding Swift, including during her appearance at the 2019 VMAs.
It is not clear if Swift loaned Meghan and Harry her guards during their stay in New York as a favor or if the Sussexes happened to hire them from a company.
Meghan Markle and Prince Harry were accompanied by a massive security detail during their whistle-stop tour of New York City over the weekend
Included in their entourage was a bodyguard, known as Jimmy, who also serves as Taylor Swift's head of security, DailyMail.com can reveal. The tall balding security guard is seen right with the pop star and her boyfriend Joe Alwyn in New York City in 2019
But their choice in security detail shows the extremely high level of protection the pair needed while on their trip to Manhattan.
The two guards were seen at the posh Carlyle Hotel on the Upper East Side every day while Meghan and Harry were staying there.
They were spotted out front coordinating with other security personnel, including those who claimed to be with the Department of Homeland Security.
Whenever the Sussexes went anywhere, the two men - who wore blazers, chinos and had their shirts untucked - always went with them.
Jimmy was featured in a 2014 profile of Swift in Rolling Stone which said that he provided 'Defcon-3 level' security for the singer.
He reportedly lives in a $5million apartment across the hallway from Swift's $15million penthouse in a residential building in Tribeca and controls the locks on the front door regardless of who comes in and out, such as other famous residents like Orlando Bloom.
Speaking to Rolling Stone in 2014, Jimmy said that 'most of the neighbors know what's what by now' and are okay with it.
A second, shorter and burlier bodyguard (left) in his 40s, who was seen alongside Jimmy (pictured together during the Global Citizens Festival in Central Park Saturday) is also known to provide security for Swift
The two guards were seen at the posh Carlyle Hotel on the Upper East Side every day while Meghan and Harry were staying there
It is not clear if Swift loaned Meghan and Harry her guards during their stay in New York as a favor or if the Sussexes happened to hire them from a company
The taller guard, Jimmy (far left) has dealt with stalkers and intruders who made their way into the Swift New York City apartment in the past
In April, he also appeared to be included in a