Actress Vanessa Hudgens is "embarrassed" by the nude photograph of her currently circulating online.

The 18-year-old's candid mirror-image shots were intended for her boyfriend and Hairspray co-star Zac Efron's eyes only - but an unknown third party stole the pictures and placed one on the internet.

Hudgens says in a statement: "I want to apologise to my fans, whose support and trust means the world to me.

"I am embarrassed over this situation and regret having ever taken these photos. I am thankful for the support of my family and friends."