It's still unclear what Lisa Edelstein will be up to on The Good Wife. She'll stop by for at least three episodes this fall as Celeste Serrano, an attorney with a connection to both Will and gambling.

But we now at least have our first look at this actress on set, although we assume she isn't in character in the following pics Edelstein Tweeted of her and Josh Charles goofing around.

Look out, Alicia, these two appear to have some serious chemistry...

The Good Wife returns on September 25 and, man, for those of us who have watched House from the beginning, it's very strange to see Edelstein as anyone other than Lisa Cuddy, isn't it?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.