Arthur, who is 26th in line to the throne, is a personal trainer and has been showing off his fitness online. The royal, 21, works at a gym in Scotland and features on their Instagram as well as regularly posting on his own account, which has nearly 200,000 followers.
He has even caused a stir in America, with the New York Post branding him a “royal thirst trap”.
Arthur is the grandson of the late Princess Margaret, the Queen’s younger sister.
He is the son of Lady Sarah Chatto and Daniel Chatto.
The buff royal has prompted an excited reaction on social media.
One fan wrote on Twitter: “Question of the day: how would one go about becoming the girlfriend of Arthur Chatto?”
Another tweeted: “Is Arthur Chatto single bc i’m ready to join the royal family.”
A third added: “Yeeeeeeessss, PLEASE! #arthurchatto!”
Another tweeted: “Watch out world!! William who?!?! (Arthur actually reminds me of someone I went through high school with!)”
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Student website The Tab reported he does not do anything without an “entourage of girls around him”.
He previously caught attention when he attended Meghan Markle and Prince Harry’s royal wedding in 2018.
The royal now works as a level 3 personal trainer at Bound Fitness in Edinburgh.
He specialises in “strength and endurance training with a military focus”, according to his profile on the gym’s website.
The profile adds: “I was lucky enough to row around the UK this summer!
“This gave me a lot of experience in training myself and the team to complete the challenging expedition.
“I’ve found physical training to be an essential cornerstone in improving my own mental health and I want to share this with others.”