McKenna Grace as Phoebe Spengler 
Finn Wolfhard as Trevor Spengler
Logan Kim as Podcast
Celeste O'Connor as Lucky Domingo
Bill Murray as Peter Venkman
Dan Aykroyd as Ray Stantz
Ernie Hudson as Winston Zeddemore
Melissa McCarthy as Abby Yates
Kristen Wiig as Erin Gilbert
Kate McKinnon as Jillian Holtzmann
Leslie Jones as Patty Tolan
Annie Potts as Janine Melnitz
Sigourney Weaver as Dana Barrett
Carrie Coon as Callie Spengler 
Paul Rudd as Gary Grooberson
Harold Ramis as Egon Spengler
Slimer