In case you weren't aware of the massive ensemble cast in Lionsgate's new comedy The Big Wedding, the studio has released a featurette that includes several of its stars. Katherine Heigl, Susan Sarandon, Topher Grace, Ben Barnes, Robin Williams, Ana Ayora, Robert De Niro and writer-director Justin Zackham discuss their experiences on the set and how everyone can relate to the lunacy that goes into putting together a big wedding. Go behind-the-scenes of this upcoming comedy before it hits theaters April 26, and enjoy eight just released photos as well.

<strong><em>The Big Wedding</em></strong> Photo 1

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<strong><em>The Big Wedding</em></strong> Photo 8

With an all-star cast led by Robert De Niro, Katherine Heigl, Diane Keaton, Amanda Seyfried, Topher Grace, with Susan Sarandon and Robin Williams, The Big Wedding is an uproarious romantic comedy about a charmingly modern family trying to survive a weekend wedding celebration that has the potential to become a full blown family fiasco. To the amusement of their adult children and friends, long divorced couple Don and Ellie Griffin (Robert De Niro and Diane Keaton) are once again forced to play the happy couple for the sake of their adopted son's wedding after his ultra conservative biological mother unexpectedly decides to fly halfway across the world to attend. With all of the wedding guests looking on, the Griffins are hilariously forced to confront their past, present and future - and hopefully avoid killing each other in the process.