Spot the Bump! Pregnant Sienna Miller Cozies Up to Boyfriend Tom Sturridge in London (PHOTOS)

By: Gabrielle Chung / March 31, 2012

Rob & Tom Walk Bear
Robert Pattinson takes his dog out with pal Tom Sturridge.
Expectant parents Sienna Miller and Tom Sturridge enjoyed a casual lunch with friends in London on Saturday. Sienna, who covered up her budding baby bump in a baggy blue top, looked positively smitten as she cozied up with her boyfriend. Although either actors have yet confirm rumors of their engagement, the mom-to-be was seen flashing massive bling on her wedding ring finger.

Regardless if they’re walking down the aisle or not, many fans are most dying to know if Tom’s best friend, Twilight hunk Robert Pattinson, will be the godfather of the couple’s new baby.

Sienna’s recently opened up to British Vogue [via The Daily Mail] about her excitement in becoming a mother. She said, “I’m feeling fine. It’s all progressing nicely and it’s very exciting. It’s nice to start a new decade.”

As for anything else about the baby, Sienna’s keeping it all mum!

“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 added.