The Heiress Star Dan Stevens on Romancing Jessica Chastain, a Downton Abbey Musical

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Since moving into the palatial Yorkshire estate on TV’s Downton Abbey, British actor Dan Stevens has gained worldwide heartthrob status—even earning the nickname, “The Downton Dreamboat.” Stevens got his start in BBC adaptations of Sense and Sensibility and Dracula, and in West End mountings of Hay Fever (opposite Judi Dench) and Arcadia. Now, he’s arrived in the States to make his Broad…