The Hangover Part 4 (2025) – Official Trailer | Zach Galifianakis, Bradley Cooper, Ed Helms

The Wolfpack returns in The Hangover Part 4, with Phil (Bradley Cooper), Stu (Ed Helms), Alan (Zach Galifianakis), and Doug (Justin Bartha) finding themselves in a situation even wilder than before.

The movie kicks off with the group reuniting for a seemingly harmless bachelor party for Stu’s cousin in Tokyo. Despite their promises to keep things tame, Alan insists on planning the night, which, unsurprisingly, leads to chaos.

After a blackout night, the group wakes up in a high-tech penthouse with no memory of the previous evening. Doug is missing—again—and they discover a cryptic note demanding they recover a stolen microchip that Alan accidentally took from a shady underground casino. As they piece together the night, the Wolfpack ventures through Tokyo’s neon-lit streets, from sumo wrestling arenas to karaoke bars, trying to unravel the mystery.

Complications arise when Mr. Chow (Ken Jeong) resurfaces, claiming he’s the only one who can help, but his involvement only creates more havoc. Meanwhile, Stu struggles with a shocking tattoo he doesn’t remember getting, and Alan unexpectedly bonds with a baby snow monkey that plays a pivotal role in the group’s escape.