Sienna Miller Gives Birth to a Baby Girl!

It’s a girl!

Sienna Miller and her boyfriend (possibly fiance?) Tom Sturridge welcomed their first child over the weekend in London.

And according to reports – including a tweet from Miller’s sister Savannah – the baby’s name is Marlowe.

The 30-year-old actress is notoriously private about her personal life, but in April she made a brief comment about her pregnancy to Vogue U.K.

“I’m in my second trimester, so I’m I-can-talk-about-it pregnant, even though I’m under strict instructions not to say anything as it would completely defeat the point of everything I’ve tried to achieve in the last eight years,” she said.

“I’m feeling fine…It’s all progressing nicely and it’s very exciting.”

Miller, who was previously linked to her “Alfie” co-star Jude Law, was first spotted out with Sturridge, 26, last spring.

He has appeared in “Pirate Radio” and “Being Julia”…. and perhaps most importantly is best friends with Robert “Sparkles” Pattinson.