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Bill Murray

Patrick Gorski/Icon Sportswire via Getty Images

Bill Murray is giving the world some of his greatest performances during the MLB World Series.

A Chicago Cubs superfan, the Ghostbusters star has been showing off his excitement during the games in order to get his favorite team in the spirit. During game three, Murray enthusiastically sang "Take Me Out to the Ball Game" during the seventh inning stretch, breathing back life into a losing game for the Cubs.

But Sunday night Murray couldn't contain his excitement after the Cubs defeated the Cleveland Indians. During a post-game interview, Murray was spotted in the background flexing his muscles and showing off the C on his arm. Viewers noticed Murray almost instantly and made the footage of him showing his team spirit go viral.

ILM's Todd Vaziri posted the footage on Twitter and dubbed the A-list actor a "scene stealer."

"Watching Bill Murray happy, makes us all happy @Cubs," tweeted another user. "Let's not let Uncle Bill down #WorldSeries."

The Indians currently lead the Cubs in the series 3-2.

Earlier in October, Murray crashed a White House briefing to tell the press that he knew the Cubs would be making it to the World Series.

"I feel very confident that Clayton Kershaw is a great, great pitcher, but we've got too many sticks," Murray told the reporters in the room who cheekily referred to him as "Mr. President."

"We also have a little bit of autumn in Chicago. You don't get that in Los Angles," Murray added. "Trees just die in Los Angeles. In Illinois, they flourish."

Murray had been in the White House to receive the Mark Twain Prize from President Barack Obama.