Ghostbusters Reboot: 29 Easter Eggs, References & In-Jokes

Sigourney Weaver's appearance is the last one in the film (unless you count the name drop in the post-credits scene, of course). She plays Rebecca Gorin, the quirky mentor introduced right at the end by Holtzmann, who appears to set herself up as a new team member.

Ironically, she's the only member of the original cast to actually play a character with any actual experience of the supernatural.

Sadly, her baby doesn't reappear in any shape or form throughout the film (well, babies, as he was played by twins).