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
Not Going Out had to be written and filmed in a short space of time, Avalon Television brought in Nick Stacey, Paul Kerensa and Simon Evans to join the writing team. Mack, Collins and Stacey concentrated on writing the main body of the episodes whilst Kerensa and Evans were involved in storylining, rewriting and 'gagging up' the episodes. The third series saw the writing team expanded, with Darin Henry, Daniel Peak and Simon Dean contributing to the main episodes (all co-written with Mack); the "gag writing" team was also expanded, from two members to as many as eight, not counting the main writers,