With two very funny and very experienced Hollywood heavyweights leading the cast, it should come as no surprise that the feeling on the set of Searchlight's Downhill was one its young star Julian Grey described as "so much fun."Working with Will Ferrell and Julia Louis-Dreyfus meant improv was a daily occurrence, a prop or two may have broken in the name of art and keeping a straight face was a real test of dramatic will, Grey explained on the SVA Theater red carpet for the film's New York