Robert Pattinson turned 26 years old and celebrated in London over the weekend with a group of friends that reportedly did not include Kristen Stewart, who is also currently in London to promote Snow White and the Huntsman. That’s just the spin from the media though, and some sites are making a huge deal about Rob looking all sad because Kristen isn’t by his side. My theory is that she was actually there and just snuck in through the back door just like Rob’s BFF, Tom Sturridge.

So who didn’t sneak through a separate entrance? Tom’s girlfriend, Sienna Miller, who showed off her large baby bump in a figure-hugging grey dress. Does anyone else find it hilarious that Sienna is now knocked up with Tom Sturridge’s baby after a few months together, yet that never happened with Jude Law, whom Sienna dated off and on for years and can allegedly get a woman pregnant merely by blinking in her general direction? Anyway, Sienna is not to be deterred from her nightlife during what looks to be the third trimester of her pregnancy. And as long as she’s not completely boozing it up (aside from the odd glass of wine), who cares? She might as well enjoy herself before becoming a milking machine:

She might be due to give birth in just a couple of months time but Sienna Miller is not ready to sit back and relax just yet. And once a party girl, always a party, even if no alcohol and an early night was on the cards.

The actress was snapped leaving Claridge’s last night after attending a dinner to celebrate Robert Pattinson’s 26th birthday. And while some celebrities will go for comfort over style when it comes to be being pregnant, especially as the big day approaches, Sienna managed to combine the two.

She looked chic in her grey jumper dress, which showed off her burgeoning baby bump and teamed the dress with peep-toed ankle boots, a green and brown belt and a huge red bag. She also sported her recently dyed hair, which is now a shade of dirty blonde.

Some may think it odd that she would be invited to a birthday dinner for the Twilight star when they have never made a film together or even considered to be friends. But Sienna’s fiancé Tom Sturridge is best friends with R-Patz and he avoided the cameras as he met her inside the hotel.

Pattinson’s girlfriend Kristen Stewart is also in the capital promoting her new movie Snow White and the Huntsmen. But she was nowhere to be seen although the notoriously camera-shy actress may have slipped in the back to avoid the flashbulbs.

[From Daily Mail]

Honestly, I hope Sienna is enjoying herself throughout her pregnancy because she loves the limelight and will probably find it to be a huge adjustment when she can’t go out and party all the time once the baby is born. Or maybe she’ll do it anyway. One never knows where Sienna is concerned.

Robert seems to have enjoyed a pretty low-key, scruffy birthday celebration for himself, and I’m sure that Kristen was probably in attendance as well to support her f–cking boyfriend. She’s probably just sick of grimacing at the cameras at this point of her SWATH promotional duties and needed a break from giving the finger to the paps. A girl’s allowed, you know.

Photos courtesy of WENN