Jon Turteltaub‘s “geriatric Hangover” buddy comedy, Last Vegas, has finally locked in its final member of its wolf pack (geriatric wolf pack?). Deadline Henderson reports that Kevin Kline will join Robert De Niro, Morgan Freeman, and Michael Douglas in the Dan Fogelman-scripted comedy. The film centers on “old friends who decide to throw a Las Vegas bachelor party for the only one of them who has remained single.” Hilarity (and broken hips?) ensues!

Previous articles on the film also refer to a love triangle element to the story, with the bachelor in question (a known playboy) falling for a lounge singer that another one of his pallies (a widower) also has his eye on. There’s no word on who will play who as of yet, but let’s just go for the obvious here – De Niro as the playboy and Freeman as the widower? That sound about right?

Last Vegas has been a few years in development, with Fogelman’s script first getting buzz back in 2010, when Jack Nicholson was rumored for the playboy role. But the film amped up in April with the casting of Douglas and De Niro, followed by Freeman signing on in May.