Ghostbusters 3 has been in development hell for most of the adult lives of many of the franchise's fans. With the passing of Harold Ramis earlier this year, it's unlikely that a real second sequel to the 1984 classic will ever take place (we'll have to settle for the Ghostbusters video game, which reunited the original cast), even though Dan Akroyd has been championing the idea for years. Doing the movie without Egon just seems like sacrilege - really, the loss of any of the original three would have been. However, what about a reboot? That's the Hollywood buzzword of the past few years after all, right? And what about an all-female reboot? Female-fronted franchises are poised to become the next big cash cow for Hollywood, with an all female version of The Expendables in the works, and now word has it that director Paul Feig is looking at directing an all-female Ghostbusters. There has been a lot of talk over the years of adding a female Ghostbuster or two to the team for any eventual sequel, something that was first suggested by Akroyd, though an all-female reboot is something new. It might be an odd idea for some, but this past week in Toronto, Bill Murray - long a holdout when it came to a possible third film - gave his seal of approval, so to speak, to the idea, suggesting a few fine ladies who he thought could join the franchise. With director Feig looking likely to finally bring Ghostbusters 3 to the big screen, it's almost inevitable that a couple of his regulars will star - but there are a few dark horse candidates out there as well. So lets take a look at eight actresses who could - and inevitably will (at least some of them) lead an all-female Ghostbusters 3.