Hugh Dillon (born May 31, 1963) is a Canadian singer and actor who is the lead vocalist of rock band Headstones. He is also a film and television actor; his notable roles include Mike Sweeney in Durham County, Ed Lane in Flashpoint and Sheriff Donnie Haskell in Yellowstone. He is also the co-creator, executive producer and cast member of the new Paramount Network series Mayor of Kingstown.