In this promotional picture, George and Hugh pose for one serious and one jokey picture, as they hold the clapboard for Downton Abbey with the details for the charity fundraiser, Text Santa.
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It is thought that George filmed his scenes with Hugh and Michelle Dockery at Highclere Castle earlier this year before his lavish wedding with to Amal Clooney, which featured exclusively in HELLO! Magazine.
It was thought that George was at Highclere to consider it as a possible wedding venue, but it later emerged that he was there for Downton Abbey.
"All the plans have been shrouded in secrecy because George was determined for his role not to leak out," a source told The Sun newspaper.
Tom Cullen, who plays Lord Gillingham, did, however, leak one secret from the set - that George had planted a kiss on Dame Maggie Smith, the show's matriarch.
"I know he gave Maggie a kiss and she collapsed onto the sofa..." he told Lorraine Kelly.
"He’s a very handsome man, isn’t he?" he added.