The 33-year old former Arsenal midfielder is in Glasgow to train with the Hoops and if all goes well, he will sign a deal with the famous club in January.
"I heard a rumour there's a big game but we'll see what happens. I have seen it on TV and have friends who have played in the game," Ljungberg said.
"It is an amazing thing and of course I would like to play in it.
"We will see how the training goes but of course I've tried to keep fit while I haven't been playing since my last game seven weeks ago.
"Celtic is a massive club and they have amazing fans. We will see what happens while I am here. I am as fit as I have ever been since I had an injury to my hip two years ago."