Downton Abbey's Unholy Feuds!

Movie set secrets revealed: Divas, lust, tragedy, booze — and a destructive dog!

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The much-anticipated Downton Abbey movie is being hailed as a blockbuster — but the jealousies, rivalries, and romances on-screen are nothing compared to the shocking secret dramas that exploded during filming!

Many of the original cast members on the long-running PBS show — including Maggie Smith, Michelle Dockery, Laura Carmichael, and Brendan Coyle — are back in the flick, which has die-hard fans buzzing.

Now, GLOBE reveals the behind-the-scenes secrets of the new movie — including who begged for a role, which stars had affairs, who was banned for booze issues and the diva who threw tantrums over cake.

-In real life, Laura, who plays plain-Jane sister Lady Edith Crawley, and Michael Fox, a lowly servant in the series, plunged into an affair during the final season and now live together.