AceShowbiz - The romance between actors Chris Pine and Annabelle Wallis is heating up after enjoying a luxury vacation in Europe with the Wonder Woman star's parents.

The new couple was spotted lounging on the deck of a yacht off the coast of Positano, Italy last week, ends August 24, when the stars were joined by Chris' father Robert and mother Gwynne.

Chris wore a hat, sunglasses, and a pair of pink swimming trunks which appeared to match a pink cover-up Annabelle had draped over her shoulder, as she was photographed in a black bikini, talking on her cell phone.

The relaxing trip comes after the pair was seen holding hands in London in early July, and stepping out together in Los Angeles two weeks later.

Chris and The Mummy actress were first linked in late March, when they were snapped arriving at London's Heathrow Airport after reportedly spending time together in Hawaii.

Both stars are known to keep their personal lives out of the spotlight - Annabelle never directly commented on her last high-profile relationship with British rocker Chris Martin, who she dated from 2015 to the summer of 2017, and previously explained her reasons for maintaining a veil of privacy, to avoid drawing attention away from her work onscreen.

"It becomes hard when you know about someone's personal life - it's just distracting," she told The Sydney Morning Herald shortly before she parted ways with Martin. "It's a whole other job in itself if you go down that road".

Pine, who has romanced Icelandic beauty queen Iris Bjork Johannesdottir, model Dominique Piek, and American reality star Vail Bloom, has also avoided disclosing details about his love life in the past.

In 2014, he told The Hollywood Reporter, "That's something that I don't really want to talk about".