To celebrate Ghostbusters Day yesterday, Jimmy Kimmel Live welcomed new and original Ghostbusters cast members Melissa McCarthy, Kristen Wiig, Leslie Jones, Kate McKinnon, Bill Murray, Dan Aykroyd, Ernie Hudson, and Annie Potts. In the above clip, Murray explains why he ultimately decided to appear in the new film: “It was only cause I knew these girls were funny,†he said. “I feel like a stepfather to the whole thing, you know?†Check out a bunch of other clips from the episode below: