High School Musical stars Zac Efron and Vanessa Hudgens may have good chemistry on screen, but off screen, it's electric.

The real life lovers could barely keep their hands off each other during a romantic holiday on the Caribbean islands of Turks and Caicos earlier this month.

High School sweethearts: Zac Efron and Vanessa Hudgens get cosy while on holiday in Turks and Caicos

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Kisses and hugs: The affectionate pair cool off in the sea

The pair, who have been dating for more than a year, stayed at the exclusive Amanyara Resort on Malcolm’s Road Beach, where they enjoyed regular arm-in-arm along the foreshore during their week long stay.

At one point, 18-year-old Hudgens straddled her 20-year-old boyfriend as they lay on the sand - a sight likely to raise eyebrows from their Disney employers.

It wouldn't be the first time Hudgens has put a dent in her squeaky clean image.

Don't look now, Disney! Vanessa and Zac get steamy on the beach

PDA: The couple could barely keep their hands off each other

The actress found herself at the centre of controversy after a nude photo of her hit the Internet last year.

Disney branded it a 'a lapse in judgment,' adding, 'We hope she's learned a valuable lesson.'

She weathered the scandal and has just wrapped filming on the £4 million feature length film High School Musical 3: Senior Year alongside Efron.

Hands on: The co-stars have been dating for more than a year

Of her co-star turned boyfriend, Hudgens has said: 'It's fun to work with him. He's really sweet, and singing all of the songs is always a blast.'

She also says the pair are more in love than ever.

'If you really love someone, you shouldn't have to work at it. You finish each others' sentences and have the same sense of humor.'

Love boat: Vanessa and Zac take to the high seas

And while they have accrued some 250million fans worldwide, don't expect HSM: The College Years.

'Not for us,' Hudgens has said. 'We're pretty much done, I think.'

Hudgens will keep busy promoting her new album, Identified, while Efron plans to focus on maturing his career on the back a new role in the drama Me and Orson Welles.

So in love: Vanessa says the pair 'finish each others' sentences'