Green Hair Cost Sienna Gardener Role

The blonde actress reveals she had a home dye disaster the night before the audition for the film - and she could not have looked worse.

Miller explains, "I've tried to dye it (hair) dark before and it went horribly wrong.

"I thought I'd be all organic and hippie and I used henna instead of normal hair colour, which, if you have blonde hair, goes green... proper pond green.

"I had an audition the next day for The Constant Gardener, which I didn't get."

Rachel Weisz eventually landed the role Miller auditioned for - and won an Oscar.

The Alfie star notes, "They made the right decision about that one."