All sorts of mayhem happens when it comes to putting together a wedding, or at least that's the assumption that many romantic comedies have given us within decades of film. 'The Big Wedding' brings us the same funky family dynamic in their brand new trailer.

What is it about wedding movies that are so irresistible to make into romantic comedies anyways? Maybe it's the fact that families are so incredibly stressed out while getting ready for the upcoming nuptials. But we're curious to see how 'The Big Wedding' is, especially since it's got a cast that includes Robert De Niro, Diane Keaton, Susan Sarandon, Robin Williams, Amanda Seyfried, Topher Grace and many others. Boy that's a lot of people.

'The Big Wedding' centers on a family gathering together for, what else, a wedding. But trouble arises when the bridegroom reveals that his Colombian mother will not let her son be married into a "heathen" family filled with divorce. In order to save the wedding, Missy (Seyfried) proposes that her father (De Niro) and her mother, his former wife (Keaton), pretend that they're still married just for the weekend. Utter mayhem ensues, as one would imagine.

You can sneak a peek at 'The Big Wedding' in the trailer below. The movie is due out in theaters on October 26th.

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