Reilly, Kelly

Jessica Kelly Siobhán Reilly (born 18 July 1977) is an English actress. Her television work includes starring roles in the British crime drama Above Suspicion (2009–2012), the American psychological medical drama Black Box (2014), the American anthology crime drama True Detective (2015) and the historical fantasy drama Britannia (2018). From 2018 to 2024, she played Beth Dutton on American neo-Western dramas Yellowstone, opposite Kevin Costner, and its spin-off Dutton Ranch (2026–present). Reilly's film work began in 2000 in the English comedy Maybe Baby. She went on to have a supporting role in the romantic drama Pride & Prejudice (2005), a leading role in the horror thriller Eden Lake (2008), the role of Mary Morstan in the mystery action films Sherlock Holmes (2009) and its 2011 sequel Sherlock Holmes: A Game of Shadows, a leading role in the American drama Flight with Denzel Washington (2012), and the psychological thriller 10x10 with Luke Evans (2018). She was nominated for a Laurence Olivier Award for her performance in After Miss Julie at the Donmar Warehouse (2003–2004).