Michelle Dockery's fiancé, commercial public relations executive John Dineen, has passed away from a rare form of cancer, People is reporting. The Downtown Abbey actress was at John's bedside when he succumbed to his illness on Sunday at Marymount Hospice in his hometown of Cork, Ireland. He was just 34 years old. Michelle released a statement via her rep about her heartbreaking loss, thanking the public for the "support and kindness" their families have received and asking to be left to "grieve in private." The couple started dating in September 2013 after being introduced by Michelle's Downton costar Allen Leech.