The two comedic actors have taken to their personal Twitter accounts to post pictures of themselves with the Ecto-1. You can check out Jonah Hill's photo below, followed by his comments. As for Kristen Bell? to see her and the Ecto-1, as she has made it her Official Twitter background.
"Who you gonna call?"
"Guys, pleeease do not be intimidated that i changed my background to a pic of me driving the Ecto-1. It's not a big thang. (read: It's a BIG thang)"