Josh Hartnett and Mischa Barton had a long night partying with their friends at Bungalow 8 in London ...

Mischa 22, s recently single again after breaking up with her musician boyfriend.

Josh, 30, is in London starring in the West End show Rain Man, and has been spotted out on the town of recent days with Daisy Lowe, who is the ex of Mark Ronson, who is the brother of Samantha Ronson, who is dating Lindsay Lohan.

Rumor is that England will soon be changing its national anthem from 'God Save the Queen' to 'It's a Small World After All'