Aging pals Billy, Paddy, Archie, and Sam have been best friends since childhood. When Billy finally proposes to his much-younger girlfriend, all four friends go to Las Vegas to celebrate the end of Billy's longtime bachelorhood and relive their glory days. However, the four quickly realize that the intervening decades have changed Sin City and tested their friendship in ways they had not imagined.
Robert De Niro
as Patrick 'Paddy' Connors
Morgan Freeman
as Archibald 'Archie' Clayton
Michael Douglas
as Billy Gerson
Kevin Kline
as Sam Harris
Mary Steenburgen
as Diana Boyle
Jerry Ferrara
as Dean
Romany Malco
as Lonnie
Roger Bart
as Maurice
Joanna Gleason
as Miriam Harris
Michael Ealy
as Ezra Clayton
Bre Blair
as Lisa
April Billingsley
as Maid of Honor