Robert De Niro, Diane Keaton Pretend to be Married in ‘The Big Wedding’ Trailer

The romantic comedy boasts a cast that includes Robin Williams, Susan Sarandon and Amanda Seyfried

Robert De Niro and Diane Keaton are sharing the big screen together as a divorced couple forced to pretend they're still married in "The Big Wedding."

The romantic comedy is jammed with talent, boasting a cast that includes Susan Sarandon, Robin Williams, Topher Grace, Amanda Seyfried and Katherine Heigl. But based on a new trailer that hit the web Tuesday, De Niro and Keaton are a long way from "Raging Bull" and "Reds."

Based on the breezy sneak peak, the two screen legends are enjoying themselves, but the film itself seems to be a big bouquet of comedy cliches. The big charade premise could have been lifted from "The Birdcage," except with aging baby boomers replacing gay club owners, and Williams, sporting a clerical collar, looks like he wandered in from the set of the doleful "License to Wed."

Based on the preview's quick look at the meticulous interiors of the gorgeous lake house that De Niro owns in the film, Keaton must have brought over the same interior designer who crafted her Hamptons oasis in "Something's Gotta Give." If nothing else, "The Big Wedding" should offer up a host of decorating ideas.

Still it's nice to see the criminally under-used Sarandon ripping into a substantial role and to have Heigl take such joy in playing a prickly character.

We'll find out if this soufflé rises on  Oct. 26 when "The Big Wedding" hits theaters.