Zac Efron is planning to pop the question to longtime girlfriend Vanessa Hudgens, according to reports.

Insiders say the actor has picked out a ring and will be offering marriage shortly.

"The proposal has been something [Zac] has been thinking about for a while," a source revealed.

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

News back in May claimed the High School Musical stars are having a "trial marriage."

Dating since 2006, the couple ended up staying under one roof after a devastating flood left Vanessa's Studio City bachelorette pad damaged to the tune of $250,000.

Vanessa left the water running in her bathtub and returned home to find a damp disaster, sources said.

Coincidentally, Zac's suburban LA home was also the site of a flood when his outdoor pool overflowed in April.

While their homes are being repaired, Zac and Vanessa are sharing a beach house just north of Malibu.

"It's been a happy twist of fate for Zac and Vanessa," a source told American tabloid the National Enquirer.