The PBS program is set at Highclere Castle outside of London, an estate currently inhabited in real life by the Lord and Lady Carnarvon. The property is available for weddings, and a source tells the Daily Mail the couple is interested in the location.
"George became close friends with Hugh Bonneville, who plays Lord Robert Crawley, when they did Monuments Men together last year," the source says. "They really hit it off. He contacted Hugh and asked him to arrange a private tour of the castle."
Alamuddin is a fan of the show, and was reportedly "blown away" by the building and its grounds.
"When he saw his bride-to-be's reaction to the spectacular Victorian castle, set on 1,000 acres of parkland, he began making some discrete inquiries about having their wedding performed there," the source continues. "He was told they would be most happy to accommodate them!"
Prices begin at $23,000 a night just to rent part of the castle. Clooney and Alamuddin have been together since 2013, and announced their engagement at the end of April.