NEW YORK (AP) -- In a new comedic Web video, Zac Efron hosts a star-studded pool party that dissolves quickly when his rude uncle arrives.
The "High School Musical" heartthrob did the video for FunnyOrDie.com, the comedy video Web site co-founded by Will Ferrell and Adam McKay. It features cameos of seemingly half of young Hollywood and a few veterans, too.
Making appearances are Nicole Richie, Vanessa Hudgens, Justin Long, Lance Bass, Queen Latifah and Carmen Electra.
Tom Lennon stars as "Uncle Hank," who embarrasses Efron with his crass behavior.
The video, posted Wednesday, was rapidly turning viral, with more than 193,000 people viewing it as of early afternoon.