Turns out Kate and Will’s favourite holiday activity is far from cocktails on the beach

The Duke and Duchess of Cambridge have just proved that they're "that" athletic couple on holidays.

Yes, as the royal family enjoy some needed R&R time in Mustique alongside their three children, Prince George, Princess Charlotte and Prince Louis, it looks like there are a lot of activities on the agenda. As Mustique is one of the families favourite places to visit, with Kate and Will visiting the holiday spot for years before they even had any children; the royal couple have some favourite things to do when visiting the Carribean Island and it's far from cocktails on the beach (even though I'm sure they have these too). According to Hello Magazine, "scuba diving, snorkelling and playing tennis are just some of the ways the Cambridges can keep themselves occupied." In fact, on previous trips to Mustique, the Duke and Duchess impressed fellow holidaymakers with their diving skills. One Beverly Hills jeweller, Martin Katz met the royals in 2008 on the island and speaking to Hello, he revealed:

"They're quite the sportsmen. We went diving and they went very deep, more than 90ft. Our instructor said Martin and I weren't qualified to go on the shark dives they went on."

Fair play. And it appears the couple also try their best to "blend in" while on holidays, with Martin explaining that they were very low-key and casual looking when he met them. I think what struck me was that they were human like everybody else, dressing to fit in like everybody else" he added.