Oh, the irony.

Prince Harry and Meghan Markle recently phoned a fan to thank her for raising $60,000 for charities they support — later to find that same fan is linked to a Twitter troll account that posts hateful and vile attacks on Prince William, his wife Kate and the Queen.

The couple told the fundraiser, Dani Trin, they were “so moved and so happy” by her efforts, but, according to The Sun, Trin is part of an eight-person coterie who ran @HenrysCousin, a Twitter account which has previously posted a string of vile tweets branding the Duchess of Cambridge a “b—h” and a “Karen,” her husband Prince William an “a—–e” and called the Monarchy a “s–t, messy, toxic institution.”

Trin acknowledged she had a log in to the @henryscousin account — which has since been deleted — but denied posting those particular tweets.

Harry and Meghan are particularly red-faced as they have made it their mission to create a safer, better social media environment.

Earlier this month, Prince Harry wrote an article for Fast Company in which he said “my wife and I (have been) calling business leaders, heads of major corporations, and chief marketing officers at brands and organizations” to tell them that “the digital landscape is unwell and companies like yours have the chance to reconsider your role in funding and supporting online platforms that have contributed to, stoked, and created the conditions for a crisis of hate, a crisis of health, and a crisis of truth.”

According to the Sun, which took screen grabs of all the noxious tweets sent by @HenrysCousin, just days before Harry, 35, and Meghan, 39, made their gushing phone call to Trin, it accused the Royal Family of being “nasty, pedophilic, racist.”

Other posts from @HenrysCousin — part of the #SussexSquad hashtag on Twitter — include “sick jokes” about Kate being an “anorexic wrinkly hoe,” a “corner plant” and repeatedly called her “Karen”; it referred to Kate as an “ugly horse face b—h” who was said to be “just bitter she still lives in a dead woman’s shadow”; #AbolishTheMonarchy b—h”;  and on Dec. 16, a message was posted under a video of “Kate shaking off William’s hand on her shoulder,” which read: “I really do believe he’s an a—–e.”

During Megxit, another screengrab from the Sun shows a tweet from @HenrysCousin noting: “Meghan’s pit stop in the Royal Family is all these inbred hoes are gonna be talking about for the next 20 years.”

The Sun added, “There is no suggestion the duke and duchess had any knowledge of or condoned the offensive messages” but that in the sycophantic tome “Finding Freedom,” Harry, referring to #SussexSquad, told a friend: “To see that support and positivity means a lot.”

Another member of the #SussexSquad @JustHarry also posted offensive tweets about Harry’s family, including one that read: “You never even hear Kate. She barely knows how to form a sentence” and “The way that Harry and Meghan aren’t part of that s–t, messy, toxic institution anymore is most pleasing to me”.

Trin was so pleased Harry and Meghan had called her that she boasted about it on @HenrysCousin in a series of tweets that read:

“This was a short call with the sole purpose to thank us all for our efforts in putting such an amazing effort in and also for our enthusiastic support in the past two years.

“They both sounded so thankful, so moved and so happy for having our support. … Meghan did tell me to, ‘Pass on the message.’

“I’m humbled to have been used as a messenger to pass on their words of gratitude to you all. Calling me was like calling all of us. … Acknowledging me personally and so directly was like doing the same to all of us.”

When contacted, Trin admitted to the Sun she was one of eight #SussexSquad members who had a password to the @HenrysCousin account, but denied personally writing abusive messages, noting: “I feel like it’s not my place to condemn or approve another person’s tweets. It’s their opinion. @HenrysCousin was like a forum and I had no control what other ­people posted. The group disbanded and the account was deactivated due to irreconcilable differences.”

Buckingham Palace and The Sussexes all declined to comment to the Sun.

But royal expert Tom Quinn told the newspaper: “The fact that Meghan and Harry have thanked a Twitter user that is also connected to nasty, vicious remarks about the Royal Family and others shows once again just how naïve they are.”