Gossip Girl will begin its fourth season in Paris, France.

Filming is already underway, as we reported yesterday, with Blake Lively, Leighton Meester, Ed Westwick and guest star Clemence Poesy on location as of this week.

Looks like Chuck Bass lives, but that's no surprise. What does pique our curiosity is Eva (Poesy): How did he meet her, and what is the nature of their relationship?

Here's Chuck and the intriguing new character on set ...

Ed Westwick is back on set and in full Chuck Bass form.

There's more to discuss than just Chuck, of course. Yesterday, we saw both Blake and Leighton with potential mystery men of their own. What do you think we can expect?

Click to enlarge more pictures from the Gossip Girl set this week ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.