Actress Sienna Miller is desperate to become a mother - and blames her sister Savannah's pregnancy for making her broody.

The British beauty is looking forward to having children of her own with actor boyfriend Rhys Ifans, and admits her sister's attitude to motherhood has inspired her.

She says, "I really want bubbies (babies) - I always have. I mean, I'm nearly 27 and you have to think about these things, don't you?"

"Sav (sister Savannah) proves you can work and be a mum. It scares me, though."