CONFIRMED: Sienna Miller is pregnant

The actress' step-mother and sister have both confirmed that she's expecting her first child

It has been confirmed by both Sienna Miller's step-mother and sister that the actress is pregnant with her first child.

Interior designer Kelly Hoppen, who used to be married to Sienna's father, said that the 30-year-old actress and boyfriend Tom Sturridge, 26, are looking forward to becoming parents for the first time, but denied rumours the couple are engaged.

SIENNA & TOM'S ROMANTIC CITY BREAK

She told the Evening Standard: 'Sienna is definitely not engaged or getting married… she is pregnant.'

Last week, it was announced that Sienna and her sister, Savannah Miller, are to leave their fashion label Twenty8Twelve, where they were both co-creative directors.

Savannah, who has two children with husband Nick Skinner, has since used Twitter to deny that they have stepped down because of their growing families and also to confirm that her little sister is pregnant.

She wrote: 'Just for the record we didn't step down at twenty8twelve because of our babies…'

Congratulations Sienna, we can't wait to see your maternity style!

SIENNA'S AMAZING STYLE HISTORY