Lee Mack comedy was doing Bobby Ball impressions at his school when he was 15. Mack is a keen supporter of Blackburn Rovers and occasionally visits Ewood Park to watch games. At one point, Mack shared a flat with Noel Fielding. In July 2012, Mack received an honorary doctorate from Brunel University. He published his autobiography "Mack the Life" () in the same year. In 2012, Mack was diagnosed with attention deficit hyperactivity disorder. Mack is a darts fan and regularly plays with his friend Tim Vine. Both men appeared on the debut series of "Let's Play Darts", facing each other in
Lee Mack the final, with Mack and his partner Martin Adams beating Vine and his partner Darryl Fitton. He currently holds the Guinness World Records title for the most darts number twos in one minute. On the same day, he also broke the record for the most darts in inner and outer bullseyes in one minute, a title which he held for a year and two months before it was broken on by professional darts player James Wade. Mack is not the first person in his family to have performed comedy. He reveals in the 2018 series of "Who Do You Think