Teens PJ and Teddy and tween brother Gabe are typical kids -- that is, until their mother has another baby. The arrival of their new sister completely upends the entire household. When their mother heads back to work after Charlie's birth, it's up to the kids and their dad to keep the home fires burning -- and to keep Charlie out of trouble as she learns to sit up, crawl, walk and run. Teddy, as the older sister, makes a personalized video diary for Charlie, in each episode adding a nugget of wisdom for her baby sibling.

Bridgit Mendler

Teddy Duncan

Leigh-Allyn Baker

Amy Duncan

Bradley Steven Perry

Gabe Duncan

Mia Talerico

Charlie Duncan

Eric Allan Kramer

Bob Duncan

Jason Dolley

PJ Duncan

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