- as Sheldon Cooper
- as Connie 'Meemaw' Tucker
- as Mary Cooper
- as Sheldon Cooper (Voice)
- as George Cooper, Sr.
- as Dr. John Sturgis
- as George Cooper Jr.
- as Dr. Linkletter
- as Missy Cooper
- as Beverly Hofstadter (Voice)
- as Tam
- as Coach Wilkins
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Watch "Young Sheldon > A Swedish Science Thing and the Equation for Toast":