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Robert De Niro & Friends Party Like It’s 1959 in ‘Last Vegas’ Trailer (Video)

De Niro is joined by Michael Douglas, Morgan Freeman and Kevin Kline in the Baby Boomer's version of "The Hangover"

Ever wonder what your parents do when they go to Las Vegas? The first trailer for director Jon Turteltaub's "Last Vegas" suggests they drink a lot of Red Bull and vodkas, hang with LMFAO, pour booze down beautiful women's throats and "party like it's 1959."

Robert De Niro, Michael Douglas, Morgan Freeman and Kevin Kline star as four friends who make the trip to Sin City after their last single pal (Douglas) announces he's getting married.

See photos: 49 of the Craziest, Booziest 'Hangover Part III' Teaser Stills

With no apparent conflict or mission, there doesn't seem to be the same kind of hook that "The Hangover" utilized to lure audiences into theaters. Instead, this bachelor party tale just promises four sixty-somethings testing the limits of their aging bodies tolerance to alcohol and energy drinks when the CBS Films release arrives in theaters on Nov. 1.

Meet the older, less-troubled versions of "Hangover" characters Doug, Stu, Phil and Alan below.