The husband and wife to-be were all smiles as they walked the red carpet together and posed for photos.
Meanwhile, Statham looked hunky as usual in a formal black and white suit.
Rosie showed off her enviable frame in a Melissa Odabash bikini, while the 48-year-old action star flaunted his buff shirtless body in a pair of swim trunks.
Jason shared a message for fans from the tropical location: he posted a photo of himself surrounded by palm trees on Facebook, writing, "Happy New Year!
In order to portray her pregnant character, she wore a prosthetic stomach throughout the film.
In May 2010, it was announced that Huntington-Whiteley would become the new female lead in Transformers: Dark of the Moon, released 29 June 2011, replacing Megan Fox.
Jason Solomons of The Observer wrote that "we're first introduced to Rosie via a close-up of her bum, segueing straight from the film's opening sequence and titles on to the pert buttocks and underwear of our heroine", and that Huntington-Whiteley's English posh girl accent "renders her practically unintelligible when surrounded by American accents and falling masonry". In a positive review, Drew Mc Weeny of Hit Fix said, "She reminds me of Cameron Diaz in The Mask, an actress who doesn't really show off any range, but who gives a natural, winning performance and who is up to the challenge of this particular picture." Huntington-Whiteley had her second acting role in the film Mad Max: Fury Road, which was released in May 2015.
The couple's public display of solidarity comes just after Kelly was branded 'disgusting' and 'despicable' by viewers on Twitter after 'laughing' during an interview on ITV show This Morning about 'punching' two of her former boyfriends.
Kelly was on the show to discuss her new autobiography Close Up, in which she recalls lashing out at her ex of seven years Jason, who she split with in 2004, and Danny Cipriani, who she parted ways with last year.