For the Harper family, four heads are definitely better than one. Siblings Nicky, Ricky, Dicky and Dawn have almost nothing in common besides their birthdays and their parents. Being quadruplets means four times the fun and four times the drama! Sibling rivalry runs deep in this family, but this "quad squad" can solve any problem when they work together.
Nicky Harper (Aidan Gallagher) is the good-mannered boy of the Harpers. He is the only one with black hair. He is shown to be less problematic.
Ricky Harper (Casey Simpson) is the brain of the Harpers but he can easily get in trouble. Sometimes, his little brain can cause a big disaster.
Dicky Harper (Mace Coronel) is the "cool" boy of the Harpers. He always tries to find the easy way out. He is also the pint-sized ladies' man.
Dawn Harper (Lizzy Greene) is the oldest of the quadruplets. She's also four seconds wiser. Because of this, she considers herself to be the leader of the pack.