Julia Roberts confesses that she does not wash her hair for two weeks after having it styled by her hairdresser.

The Ocean's Twelve actress is so taken with the results that stylist Serge Normant manages to achieve that she tries to avoid washing her hair for as long as possible in order to keep the effect.

She explained to Contactmusic: "One of the tricks I've learned over the years is that I can milk a great style to the last possible second. Honestly, after he does my hair, I won't do anything to it for - wait for it - two weeks.

"My hair doesn't get greasy very fast, so I can go a good ten days without washing it," the star added.