The Hangover's success has lead to plenty of imitators and spin-offs, but it became such a juggernaut in its own right that it has expanded into a trilogy (but will we also get a Hobbit-esque origin story eventually? Stay tuned …). Principle photography is underway for the finale of the Hangover trilogy, which will reunite its steadfast cast (Bradley Cooper, Ed Helms, Zach Galifianakis and Justin Bartha) as well as their on-screen wives (Gillian Vigman, Sasha Barrese and Jamie Chung) and other familiar faces (Ken Jeong, Heather Graham, Jeffrey Tambor) as well as a new one (John Goodman).

Todd Phillips is also returning to direct the Warner Bros. picture as well as co-write it along with his collaborator from the second movie, Craig Mazin. Hit the jump for more on the production, as well as a hint to what the new film will be about.

The production commencement announcement includes this tease regarding the film’s possible road trip-centered plot:

This time, there's no wedding. No bachelor party. What could go wrong, right? But when the Wolfpack hits the road, all bets are off.

As we reported earlier this summer, the film will take place in Tijuana, with some scenes also set in Las Vegas and Los Angeles.  Per Adam, "Further details are unknown, but Tijuana fits with the debauchery-filled locales of Vegas and Thailand from the first two films. If I’ve learned anything from The O.C., it’s that Tijuana is a very dangerous place for rich overpriveleged white kids people to be partying in." (Glad to know I'm not the only one who immediately thought of Marissa's ill-fated journey to Mexico when I read this production note!)

With all of the favorite cast members returning, things are looking promising. Hopefully though, this installment of the franchise will feel fresher than the last. According to director Todd Phillips, we have nothing to fear -- no weddings, no bachelor parties … just the Wolfpack doing their thing.

The Hangover Part III is set for a May 24, 2013 release.