Michael Douglas, Robert De Niro, Morgan Freeman and Kevin Kline are cutting loose in Las Vegas as part of a boozy bachelor party in CBS Films’ new trailer for “Last Vegas.”

The film is about four childhood friends out to celebrate Douglas’ character’s impeding wedding to a much younger woman — with plenty of footage of bikini-clad ladies.

“I’m gonna find some damn water, then take all my damn pills, and then we gonna get this damn party started,” Freeman declares.

The trailer debuts in theaters this weekend and “Last Vegas” opens Nov. 1 against Lionsgate’s “Ender’s Game” and Relativity’s “Free Birds.”

“It’s going to be legendary,” the trailer concludes.