The Birdman star is in Atlanta, Georgia filming his next movie, The Founder, and he decided to take a little time out from work to cheer on his favourite team as they visited the home of the Braves.

However, the experience was marred by one particularly loud sports fan, who spent the entire game harassing the Pirates' centre fielder Andrew MCCutchen, so Keaton decided to give the unidentified heckler a piece of his mind at the end of the game.

Photos of the incident show the Oscar nominee approaching the man in the stands and giving him a talking-to, while pointing to the scoreboard to boast about the Pirates' win.

Keaton then proceeded to pose for photos and sign autographs for fans who applauded his actions.