Entertainment TV 'Downton Abbey' 's Allen Leech Is Engaged to Jessica Blair Herman! Allen Leech, known for his role as Tom Branson on the award-winning PBS series Downton Abbey, is engaged to actress Jessica Blair Herman By Dave Quinn Dave Quinn Instagram Twitter Dave Quinn is an Editor for PEOPLE, working across a number of verticals including the Entertainment, Lifestyle and News teams. People Editorial Guidelines Published on February 15, 2018 02:20 PM Share Tweet Pin Email Downton Abbey star Allen Leech is getting ready to walk down the aisle! The 36-year-old Irish actor, known for his role as Tom Branson on the award-winning PBS drama series, is engaged to actress Jessica Blair Herman (American Crime Story, Fresh Off the Boat). “Happy Valentine’s Day @jessicablairherman,” Leech wrote on Instagram Wednesday, captioning a selfie of the two. “First one as a fiancé!” he added, breaking the news of their engagement. “Thank you for saying yes and for making me the happiest.” In case fans were curious, Leech made it clear he didn’t pop the question on the romantic holiday. “No, I didn’t do it today. It’s been a while,” he wrote. JB Lacroix/WireImage See the Downton Abbey Cast Out of Costume RELATED: The Downton Abbey Cast Reveals How Crazy Reunions Get Since The Show Ended Herman wrote an equally adorable post on Instagram, captioning a shot of the two cuddling up to one another. “The day you proposed was one of the best days but every day with you is my favorite,” she said. “I love you! Happy Valentine’s Day @therealleech!”️ The pair has been dating since 2016. Leech previously dated Sky Sports presenter Charlie Webster.