Has she fallen for co-star?

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Sienna Miller is said to have fallen for her latest co-star, Sean Bean.

The pair – who will begin filming Oscar Wilde’s A Woman Of No Importance in September – are reported to have spent a romantic evening together at the 25-year-old’s West London home.

‘She’s completely mesmerised by Sean already,’ says a pal. ‘She’s told friends that she can’t help feeling transfixed by his green eyes and loves the fact that he’s a real macho man.’

And smitten Sienna is understood to be on the phone non-stop to the 48-year-old.

‘He’s almost twice Sienna’s age but she doesn’t care,’ the source tells the Daily Mail.