It may have seemed like a cosy love-in for a H๏τ new couple.

But Harry Styles and Kendall Jenner’s New Year’s Eve holiday in St Barts has not only been crashed by their mothers, but by Ellen DeGeneres and Portia de Rossi.

Supermodel Kendall did little to make them feel comfortable either, as she stripped straight to her teeny ʙικιɴι and paraded around the sundeck with her lithe figure on show.

Kendall was looking sensational in her two piece, which was white to help highlight her improving Caribbean glow.

The twenty-something superstars welcomed the arrival of the chat show host, 57, and her wife, 42, after opening out the luxury yacht to Kris Jenner, 60, and One Direction mom Anne Cox, 46.

The popstar and the model have been seen growing increasingly closer during a sun-soaked getaway to St Barts; putting on a very steamy display at times.

Yet just as they tried to rekindle their romance from 2013, their Carribbean jaunt seemed to have been overun by unlikely stars.

The 20-year-old supermodel had invited her equally-famous mum Kris Jenner, the matriarch of the Kardashian clan, along on the holiday with her boyfriend Corey Gamble.

And mummy’s boy Harry seemed pleased to see his own mother arrive on the boat the same day.

Nevertheless, the couple seemed a little more surprised to see Ellen and Portia arrive, however, and stood on the sundeck with confused expressions as the blonde-haired duo arrived by speed boat.

Kendall, now draped in a chic bohemian sun dress, stood gazing out to see with her camera in hand and seemingly scratching her head.

When Harry emerged, he seemed to find the whole situation funny and followed her out to see the view with a characteristically chirpy grin on his face.

The sociable Brit was also the first to greet the famous couple and was seen sharing a drink with them on one of the lower decks.

Having just rung in the New Year, Kendall and Harry seemed to have been enjoying breakfast when they were met with the surprise arrival.

While mother Kris is notorious for her many famous friends and socialising, TV personality and comedienne Ellen is known for superstar wind ups, though it’s not known whether all of the guests were personally invited by the young holidaymakers.

The former couple, who previously dated in 2013, had been enjoying a little of their rare down time together – with the new addition of their mothers.

Kendall, who found fame alongside her mum in 2007 on Keeping Up With The Kardashians, has been spotted in a host of Sєxy ʙικιɴιs as she embarks on her trip with ex-boyfriend, Harry.

Kris rocked her favoured vacation look with a white fedora atop her famous raven crop, a tie-dye monochrome beach cover and a huge pair of sunglᴀsses.

Proving himself to be quite the mummy’s boy, Harry stood with his arm draped around Anne, who has had her own dabble with reality TV after appearing in ITVBe’s Real Housewives Of Cheshire in February.

Standing shirtless and flaunting his plethora of inkings, he was also sporting a trendy, navy military cap beneath a huge pair of sunglᴀsses.

It is unknown if the mothers have met previously following the Harry and Kendall’s rumoured fleeting romance two years ago; something that Harry later dismissed as a few dates.

At the time, Kendall and Harry – who both have high profile exes – refused to confirm their romance, though things seem to have taken a more positive spin at the close of 2015.

They were first spotted by fans on Tuesday night in neighbouring Anguilla, where they reportedly dined at Blanchards restaurant.

Aboard the boat, Harry and Kendall – both deserved of some time off from the non-stop demands of their international schedules – are also joined by friends this week.

It’s not their first holiday together because they were previously known to have spent time skiing in Mammoth, California, in January 2014, not long before their romance fizzled out the first time.