Now, ITV has unveiled a teaser — seconds, really — of the 53-year-old’s appearance on the show’s charity special.
Lady Cora (Elizabeth McGovern) has the lucky task of mistakenly asking Clooney to dinner (she thinks he’s her husband Lord Grantham).
Clooney’s character remains a mystery but really, no one’s complaining.
The charity special — in support of ITV’s Text Santa — will air in the U.K. on Dec. 18.
Watch the very short teaser, above.