"This was a photo which was taken privately," said Jill Fritzo, Hudgens' publicist, on Friday. "It is a personal matter and it is unfortunate that this has become public."
The photo shows the 18-year-old actress standing naked in what appears to be a bathroom, with a red shower curtain behind her.
The Disney Channel (part of the Walt Disney Co.) denied a published report that Hudgens will be dropped from the upcoming feature film "High School Musical 3." That movie is in development and negotiations with the stars are incomplete.
Disney had no further comment about the pictures.
Hudgens portrayed Gabriella, the brainy love interest of Zac Efron's basketball star in the first two "High School Musical" made-for-cable movies. The two are said to be dating in real life.
"High School Musical 2" attracted more than 17 million viewers for its Disney Channel premiere in August, the most-watched television program of the summer.
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