Washington, July 9 - High School Musical star Zac Efron is planning to pop the question to girlfriend Vanessa Hudgens, according to reports.

Insiders have revealed that Efron has selected a ring and will go down on his knees shortly.

"The proposal has been something [Zac] has been thinking about for a while," Showbiz Spy quoted a source as telling National Enquirer.

"He already has the ring picked out and I wouldn't be surprised if we saw the two engaged this summer," the source added.

Recent reports have also claimed Zac and Vanessa are having a "trial marriage"

"It's been a happy twist of fate for Zac and Vanessa," added the source. (ANI)