Blue Bloods star Tom Selleck and former West End performer Jillie Mack are among the most low key couples in Hollywood. The A-list Magnum P.I. star has been married to British born Jillie for more than three decades, however very little is known about their romance. The couple met when Tom was in London filming the movie Lassiter, and his future wife caught his eye when he saw the stage production of Cats on the West End. Here’s everything you need to know about Jillie.