The first trailer and poster for the ensemble romantic comedy The Big Wedding have been released.  The film centers on a divorced couple (Robert De Niro and Diane Keaton) who are forced to pretend like they’re still married when their adopted son’s (Ben Barnes) deeply religious biological mother comes to town for his wedding.  Zaniness ensues.  Though the involvement of Katherine Heigl puts this one immediately on iffy ground, the highlight of the trailer is the chemistry between De Niro and Keaton. If the film focuses mainly on their relationship, we might be in for a fairly amusing rom-com.  That said, the clip definitely plays up the farcical tone and “wacky antics” that occur when everything goes awry, so I’m not exactly holding my breath.

Hit the jump to watch the trailer.  Directed by Justin Zackham, the film also stars Amanda Seyfried, Susan Sarandon, Topher Grace, and Robin Williams.  The Big Wedding opens on October 26th.

We have couple of casting bits to bring you this Friday afternoon. First up, Robin Williams has joined writer/director Justin Zackham’s (writer, The Bucket List) wedding comedy Gently Down the Stream. Williams brings another star to an already stellar cast that includes Robert De Niro, Diane Keaton, Amanda Seyfried, and Katherine Heigl. Per Variety, the Oscar-winning actor will play the role of Father Monaghan in the pic that tells the story of a long-divorced couple (De Niro and Keaton) who pretend that they’re still married for the sake of their adopted son’s upcoming wedding. Rounding out the Gently Down the Stream cast are Susan Sarandon, Patricia Rae, and Ben Barnes. Production on the film is expected to begin this July.

Speaking of Ben Barnes, The Chronicles of Narnia actor has signed on to star alongside Jeff Bridges and Julianne Moore in the Warner Bros./Legendary Pictures fantasy project The Seventh Son. Variety reports that Barnes is in line for the title role (the same one Sam Claffin was once in talks for) which is described as “the seventh son of a seventh son” who learns all things wizard-related. Directed by Sergei Bodrov (Mongol: The Rise of Genghis Khan), the pic is based on Joseph Delaney’s young adult book series. For more on the project, hit the jump to read a synopsis for the series’ first installment, Revenge of the Witch.

Robert De Niro, Diane Keaton, Katherine Heigl, and Amanda Seyfried are set to star in the indie comedy Gently Down the Stream for writer-director Justin Zackham (The Bucket List).  According to Variety, “De Niro and Keaton play a long-divorced couple who, for the sake of their adopted son’s wedding and his biological mother, pretend they are still married. They quickly learn that acting the part isn’t easy, especially when their past, present and future unravel for all to see.”  While all these actors have done good work (and in De Niro and Keaton’s case, unforgettable work) in the past, these days the presence of De Niro and Heigl is like putting a giant “Warning: This Movie Will Likely Be Terrible” sign on the poster.  You can dismiss my negativity, but how many terrible films do you need to see them in before you say “I see a disturbing pattern developing.”

But hey, maybe this will break the streak.  Now Lucy, get ready for me to kick that football.  Production begins this July in Greenwich, Connecticut.