The film stars Bradley Cooper, Ed Helms, Zach Galifianakis, Ken Jeong, Jeffrey Tambor, Heather Graham, Justin Bartha, and John Goodman with Todd Phillips directing a screenplay written by himself and Craig Mazin.

Principal photography began in September 2012 in Los Angeles, California before moving to Nogales, Arizona and Las Vegas, Nevada, concluding that November.

The group attends an intervention in which Alan agrees to visit a rehabilitation facility in Arizona and seek treatment as long as the "Wolfpack" take him there.

They break into the house and retrieve the gold, but Chow double-crosses them, locking them in the basement, rearming the security system and escaping in Phil's minivan.

He spares the group for the oversight but kills his head enforcer "Black Doug" after failing to stop the four and reminds them of their now two-day deadline.

The trio take the gold and meet with Marshall, who releases Doug when they reveal they cannot secure the original half as Chow lost it in Bangkok.

In May 2011, days before the release of The Hangover Part II, director Todd Phillips said that "there already are plans for a third film but no script or start date".

"[6] Also during May, Craig Mazin, who co-wrote The Hangover Part II, entered early talks to write the script for the third installment.

[8] In January 2012, it was reported that stars Bradley Cooper, Zach Galifianakis, and Ed Helms were nearing deals to reprise their roles in the third installment with each receiving $15 million (against the backend) for their participation.

"[11] In March 2012, Warner Bros. announced that it was moving forward with the sequel and scheduled a release date of May 24, 2013, again aiming for a Memorial Day opening weekend.

The report stated that much of the film would also be shot in Los Angeles and Tijuana and include a storyline that involves the boys rescuing Alan from a mental hospital.

[17] In August, John Goodman began talks to join the cast in a small role, then described as an antagonist in the same vein as Paul Giamatti's character in Part II.

by Black Sabbath, "Dark Fantasy" by Kanye West, "In the Air Tonight" by Phil Collins, and "Careless Whisper" by George Michael.

The site's critical consensus reads, "Less a comedy than an angrily dark action thriller, The Hangover Part III diverges from the series' rote formula, but offers nothing compelling in its place.

[40] Andrew Barker of Variety gave the film a negative review, writing, "Ditching the hangovers, the backward structure, the fleshed-out characters and any sense of debauchery or fun, this installment instead just thrusts its long-suffering protagonists into a rote chase narrative".

[41] Barker seemed to think that it was 'debatable' whether The Hangover Part III should be considered a comedy at all, seeing as its events 'more often plays like a loopily plotted, exposition-heavy actioner.'

He states: 'That the plot is convoluted and ridiculous isn’t really a problem, but by playing things completely chronologically — and worse, soberly — this film’s shenanigans feel witlessly arbitrary in a way that the previous installments avoided.

'[42] Stephen Farber of The Hollywood Reporter wrote, "Young viewers looking for unbridled raunch will be sadly disappointed, and so will other moviegoers expecting more than a few wan chuckles.

"[43] Steven Holden of The New York Times called The Hangover Part III "a dull, lazy walkthrough that along with The Big Wedding has a claim to be the year's worst star-driven movie.

"[46] Christy Lemire of the Associated Press gave the film a positive review, writing, "The Hangover Part III runs a different sort of risk by going to darker and more dangerous places than its predecessors, both artistically and emotionally.