The 'High School Musical' cutie has revealed he allows his luscious locks to dry naturally overnight because this makes his "messed up" style last throughout the day.

He told TIME.com: "I've never told anyone this before. This is a hair scoop. Shower before you go to bed, and then sleep on your wet hair. Towel-dry it. In the morning, it's all messed up naturally. If you have that messed-up thing going when you wake up, it's more willing to stay that way. That's Zac's hair tip."

This is not the first time Zac has revealed his hair-styling tips.

The 22-year-old star recently admitted he opted for the messy style because he was lazy.

He explained: "Someone said to me that guys are trying to copy my hairstyle, but to be honest, this hairstyle is derived from laziness. I wake up and go - that's it. There's no product in it, nothing.

"If you really want your hair to look good, just don't wash it for a day. That's my secret."