Rumored to be single again, party-loving Sienna Miller had a very busy night out when she hit up the Hollywood Dominos event in Mosimann’s in London.

She sat next to Kylie’s ex Olivier and played a few hands with him. She also enjoyed a drink with Josh Harnett and David Walliams. Sienna then spent the rest of her evening at the Jalouse nightclub. The flirtatious actress then left the club at 4:00 a.m. at the same time as Josh Harnett and looking like a woman sending out a loud message that she is moving on.

Josh Hartnett and Mischa Barton were spotted on the town together after a night of fun in a London club,

Mischa just recently split up with her musician boyfriend Taylor Locke so it seem she was on the pull. Josh and Mischa arrived separately to Bungalow 8 nightclub late last night. An eyewitness reported that Mischa did everything in her power to make sure Josh noticed her.  “Josh looked pretty bored and was totally ignoring Mischa. She persisted though, and kept getting closer and closer to their table while dancing provocatively. Lots of girls were trying to get near their table, where the two guys were drinking champagne and vodka cocktails. Mischa had a lot to contend with, but didn’t give up.”

And it looks like she was successful, as the two were spotted heading back to his hotel after leaving the club.  But it couldn’t have gotten too wild - Barton only stayed at Josh’s for about an hour before returning to her own hotel.

 Josh Hartnett was left red-faced after twice being refused entry to a London venue after the door staff didn’t recognise him.

The Pearl Harbour and Lucky Number Sleven actor was trying to get into the Roof Gardens in Kensington. However, door staff turned him away for wearing trainers. The perk of being an A-list star is skipping queues at clubs, next time Josh you should have maybe followed out guestlist rules.