Iain Armitage Sheldon Actor Zoe Perry Mary Actor Lance Barber George Sr. Actor Annie Potts Meemaw Actor Montana Jordan Georgie Actor Raegan Revord Missy Actor Jim Parsons Adult Sheldon Narrator, Executive Producer Ryan Phuong Tam Guest Star Charlie Hankin Randall Guest Star Cleo King Mrs. Costello Guest Star Chris Wylde Glenn Guest Star Corey Mendell Parker Customer Guest Star Jonathan Brooks Radio DJ Guest Voice Piotr Michael Emergency Alert Guest Voice Chuck Lorre Executive Producer, Writer Steven Molaro Executive Producer, Writer Todd Spiewak Executive Producer David Bickel Writer Damir Konjicija Writer Dario Konjicija Writer Teagan Wall Writer Jaffar Mahmood Director