The Hangover Part II did not have the full support of my entire cast and crew." Liam Neeson replaced Gibson after being invited by Cooper, who worked with Neeson on "The A-Team", to take the part. Neeson, a fan of the first film stated, "I just got a call to do a one-day shoot on 'Hangover 2' as a tattooist in Thailand, and that's all I know about it". Gibson was reportedly furious over the decision. A source close to Gibson stated, "He doesn't understand why Mike Tyson, a drug user who turned his life around, was given a chance while Mel was kicked
The Hangover Part II be reteaming with director Todd Phillips to score the film. The project marks the fourth collaboration between Beck and Philips, who also worked together on "School for Scoundrels", "The Hangover" and "Due Date". In April 2011, "Variety" reported that Liam Neeson's cameo as a Bangkok tattoo artist had been cut and Nick Cassavetes had been re-cast in the role. While editing, Phillips cut the scene that immediately followed Neeson's cameo, meaning it no longer had the information necessary to logically get the main characters to the situation in the next scene. Three weeks later, Phillips decided to reshoot the scene,