Clooney assumed his long-awaited and temporary role in the British aristocracy in a special 9-minute episode of the show for the TV fundraiser Text Santa.
In the hilarious tongue-in-cheek video above, Lord Grantham – with the help of Ab Fab's Patsy Stone! – sees what life would be like at the Abbey if he were replaced by a certain George Oceans Gravity, Marquis of Hollywood – otherwise known as Lord Hollywood.
And we'll just say Downton has been turned upside down by Clooney's charms. In fact, Lord Hollywood had such an effect on Dame Maggie Smith's character, the Dowager Countess, that when he kissed her hand she fell off her perch and collapsed on the floor.
"That man has got the entire household behaving like fools!" Lord Grantham says, after seeing how his loved ones behave without his influence. "Downton has gone to rack and ruin without me."
Luckily, the whole thing was just a bad dream.
Text Santa is a charity fundraiser that helps support a string of U.K.-based cancer and children's charities. Click here to donate.