"Hangover 3" buzz continues as the official trailer is released for the comedy due to hit theaters this summer.

The first trailer for "The Hangover 3" hit the web on Thursday, just one day after the release of the "Harry Potter"-like movie poster was unveiled to the public.

The trailer promises that "it all ends" here for the drunken adventures of Bradley Cooper, Ed Helms and Zach Galifianakis as Phil, Stu, and Alan.

And if the "Hangover 3" trailer is any indication, the newest installment of the Todd Phillips trilogy does not look like it will disappoint.

The so called "Wolf Pack" heads back to Vegas for the final leg of their "Hangover" journey.

The "Hangover 3" trailer begins with an angelically voiced Alan singing "Ave Maria" at his father's funeral and only gets weirder from there.

Zach Galifianakis is shown pulling a giraffe in a trailer down the highway and shares a lollipop with comedienne Melissa McCarthy in a scene which appears to be love at first sight.

"We've been on a lot of adventures together and it seems like you haven't learned anything. Anything!" Alan notes to Stu on the side of the road.

Title cards between the clips read, "The epic conclusion to the trilogy of mayhem and bad decisions."

Details of the "Hangover 3" plot line have been kept relatively private.

The trailer shows that both Mr. Chow (Ken Jeong) and stripper Jade (Heather Graham) are back for "Hangover Part 3," but there is no sign of Doug (Justin Bartha).

The unexpected box office success of the original, low-budget, bachelor-party-gone-wrong themed movie in 2009 has turned "The Hangover" series into an international goldmine.

The original flick scored a Golden Globe and helped launch the careers of Bradley Cooper and Zach Galifianakis.

The "Hangover 3" is scheduled to be released Memorial Day weekend.