Its no secret that Bill Murray wasn't always destined to be a Ghostbuster. In fact, he was drafted in at the last minute after the untimely death of John Belushi the man the role was actually written for. A friend of Dan Aykroyd, the pair had frequently appeared on Saturday Night Live and Belushi would have been the original Peter Venkman. In fact, the original line-up is rumoured to have consisted of Dan Aykroyd, John Belushi and Eddie Murphy. But it seems that last one might have been a bit of a stretch. " was never a consideration, said director, Ivan Reitman. had this wonderful, likeable, kind of naïve quality, and I just cast him. But John Belushi wasn't the only cast member who was switched out. The inimitable John Candy was also supposed to star in the movie as Louis Tully the man eventually played by Rick Moranis. But it seems he left the production with a case of sour grapes after many of his ideas for the character were ignored. For instance, he felt that Tully should speak with a German accent and own a pair of schnauzer dogs. But Reitman wasn't so sure. "I said, I'm sorry, Johnmaybe next time'. Thankfully, the role eventually went to Rick Moranis, who gave us the suitably snivelling Louis Tully that we all know and love. And the two enormous, terrifying dogs remained with Gozer...