- as Sheldon Cooper
- as Mandy McAllister
- as Mary Cooper
- as Dr. Linkletter
- as George Cooper, Sr.
- as Jim
- as George Cooper Jr.
- as Professor Salzman
- as Missy Cooper
- as Wade
- as Connie 'Meemaw' Tucker
- as Herman
- as Sheldon Cooper (Voice)
- as Lyle
- as Mr. Ziegler
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Watch "Young Sheldon > A Roulette Wheel and a Piano Playing Dog":