Sienna Miller sports rough hairdo at premiere

Sienna Miller attended a glamorous event in New York this week (begs03Jun13) with greasy, scraped-back hair after her young daughter smeared yoghurt in it.

The actress attended the screening of her new movie Just like A Woman on Wednesday (05Jun13) and had to scrunch her locks into a makeshift ponytail after mischievous Marlowe, who turns one next month (Jul13), flicked her with the milky snack.

Miller frantically brushed the substance from her tresses but had no time to restyle her hair, telling UsMagazine,com, "Here's a secret: there's yoghurt in it. Marlowe got (it) in my hair before mommy was leaving. I didn't have time to do my hair for real, so I just pulled it back - and got the yoghurt out of course. But that's being a mother."