Efron, Hudgens arrive in Australia

Zac Efron and girlfriend Vanessa Hudgens have arrived in Australia.

The pair, who are believed to have been dating for over four years since meeting on the set of the first High School Musical film, were spotted together at Sydney Airport yesterday.

Efron is in the country for a 'learn to surf' promotion, organised by sunglasses company Oakley to raise awareness for their charity OneSight Foundation, which helps improve vision for those in need.

Also taking part in the event are Layne Beachley, Maude Garrett, James Tobin and Nikki Phillips.

It is believed that Efron and Hudgens will stay in Sydney for at least two days.