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 Wallace Shawn Dr. John Sturgis Guest Star Ryan Phuong Tam Guest Star Brian Stepanek Mr. Givens Guest Star Isabel May Veronica Guest Star Wyatt McClure Billy Sparks Guest Star Ed Begley Jr. Dr. Linkletter Guest Star Zoran Radanovich Russian Dad Guest Star Kirt Kishita Japanese Dad Guest Star Jordan Leer Bryan Guest Star Franco Vega Agent 1 Guest Star Chuck Lorre Executive Producer, Writer Steven Molaro Executive Producer, Writer Todd Spiewak Executive Producer Tara Hernandez Writer Eric Kaplan Writer Chris Koch Director