Update: Sienna Miller's step-mum Kelly Hoppen has confirmed the star is indeed expecting. Kelly told the Evening Standard, "Sienna is definitely not engaged or getting married… she is pregnant."
Sienna Miller appears to have followed Peaches Geldof's lead and has reportedly become one of the first celebs of 2012 to reveal she's pregnant. A whoosh of excitement went around MFM HQ when this news broke – we can’t wait to steal her pregnancy style!
Actress Sienna, 30, and boyfriend Tom Sturridge, 26, have been together for around a year and have previously spoken about their lack of marriage plans. But according to a source speaking to Us magazine, their freinds aren't surprised about the pregnancy, as the couple are "really good together".
Back in September Sienna and Tom double dated with Robert Pattinson and Kristen Stewart so let's hope Sienna hasn’t seen that labour scene!
After a well publicised on/off relationship with actor Jude Law, Sienna seems to be moving on, with friends claiming to be delighted about her relationship with Tom.
The couple haven’t publically confirmed the rumour themselves, but reportedly told friends and family the happy news in London over Christmas. Watch this space for more info.
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