The Internet and news media have been abuzz for quite some time now as to whether or not George Clooney will return to "ER" for the long-running show's final season. Now, "ER" Executive Producer John Wells lets the cat out of the bag. Or does he?

"We are going to have a lot of people coming for the conclusion," Wells tells ET at the TCA panel for his new NBC series "Southland." "We have already done some: Anthony Edwards, Noah Wyle, Eric LaSalle. George is very busy; he is very handsome. He is just finishing up in Puerto Rico on a film. We have talked about it a couple of times.

"We will be shooting down there at the end," continues Wells. "If he comes by and wants to do something, we will make it work. We have a wonderful cast now. I would be surprised. But then, George loves practical jokes. Who knows?"

Clooney's rep was not reachable.

ET has learned that the final episode of "ER" will air Thursday night, April 2 now that they have extended the season's run by three extra episodes. A one-hour clip show retrospective will run just before the final episode airs.

Stay tuned to ET for more "ER" news!