One wouldn't think that comic legends Robin Williams and Bobcat Goldthwait have a lot in common. While they both forged successful comedic careers in the 1980s, they both took different paths when they first worked together on Goldthwait's directorial debut, Shakes the Clown. They're both back together in Goldthwait's third feature film, World's Greatest Dad, which stars Williams as Lance Clayton, a father that makes some interesting choices after the death of his son, Kyle (the hilarious Daryl Sabara). We were able to speak with both Williams and Goldthwait exclusively about their new film, so click below for our exclusive video interview with the star and writer-director of this new dark comedy.

World's Greatest Dad stars Robin Williams, Alexie Gilmore, Daryl Sabara, Geoff Pierson, Henry Simmons, Mitzi McCall and will come out in limited release on August 21.