The news that Michael Douglas is set to star in the upcoming CBS Films comedy 'Last Vegas' practically blew up the movie world yesterday afternoon, but who else will be joining the cast? After all, this is an ensemble comedy, Douglas shouldn't be the only one pulling the comedic punches.

Vulture reports that actor Robert De Niro is currently in the middle of talks to go and co-star in the film, playing the friend of Douglas' character who's in love with the same girl. The story centers in Las Vegas where a man celebrates his bachelor party before he gets married to somebody half his age.

This could be a really cool combination of older actors if they continue to cast properly. Apparently Dustin Hoffman and Christopher Walken were once attached to the project but have both fallen out due to scheduling conflicts. 'Last Vegas' was actually supposed to begin filming at some point in 2010 but ultimately stalled when Douglas became ill.

'Last Vegas' is written by Dan Fogelman, the same man who wrote 'Crazy, Stupid, Love,' and will be directed by Jon Turteltaub ('The Sorcerer's Apprentice'). Since this has been sitting on the back burner for awhile, here's hoping that 'Last Vegas' is superior to 'Crazy, Stupid, Love' which suffered from cheesy third act problems.