Why is Sienna Miller putting KETCHUP in her hair
11:48 GMT, 15 May 2012
Her honey-blonde locks complete her signature boho look.
So when a bottle of hair dye turned Sienna Miller's mane a shade of green she was devastated.
But instead of visiting a salon to rectify the problem the actress and soon-to-be mother has revealed that she doused her tresses with tomato ketchup for a year.
Beauty blunder: Sienna Miller has revealed that she used tomato ketchup in her hair after a bottle of hair dye turned it green
The 30-year-old made the error
of colouring her hair brown using henna.
Henna is a flowering plant, native to regions of Africa, southern Asia, and northern Australasia used
to dye skin, hair, fingernails, leather and wool.
Ms Miller, who is expecting her first child with boyfriend Tom Sturridge, said: 'I've had some real hair disasters. I once used henna to dye my hair brown for an audition, thinking I was being clever as it's all natural'
Ms Miller fixed her hair dye blunder with a bottle of ketchup
'Little did I know it was the worst thing I could have done as it coats the follicles so that nothing else can penetrate so I ended up having to put ketchup in it for about a year to get rid of the green tinge.,' she told Marie Claire magazine.
Ms Miller went brunette in 2004, circa her engagement to actor Jude Law.
But it's not the only makeover mishap she has made in the past.
The Factory Girl star also found false eyelashes failed to achieve the desired effect.
'I once made the mistake of going for a whole row of false eyelashes, which was just wrong as it gave me a sad, puppy-eyed look.
'But a couple of individual lashes in the middle of the lash line can look amazing and really open up your eyes.'
Last night the actress was snapped leaving Claridge's after attending a dinner to celebrate Robert Pattinson's 26th birthday.