Zac Efron doesn’t shower.

The High School Musical heartthrob reportedly goes days without washing and refuses to shower even after playing a gruelling game of basketball.

An insider on the set of High School Musical 3 told America’s Star magazine: “Zac isn’t a big fan of showering. It’s so gross, because Zac loves to work out and plays basketball all the time – and then goes days without showering.”

The 20-year-old actor – who is dating his High School Musical co-star Vanessa Hudgens – is said to rely on wet wipes when he gets too smelly.

The insider added: “When he gets lazy, he likes to clean himself with baby wipes!”

Zac recently revealed he finds it easier to talk to women than men.

He said: “There have been things in my life that my mum could always do which my dad couldn’t even come close to, such as talking to me in a very personal way. You can be ‘real’ with guys, but not really emotional.

“Girls are good at just being there for you.”

DIRTY LAD: Zac Efron refuses to shower on the set of the new High School Musical movie, an insider says.