Charlotte "Charlie" Duncan is the second youngest of the Duncan family. She was originally the baby of the family, until it was announced in Good Luck Charlie, It's Christmas! that her mother Amy is pregnant again with a new baby. She was born three weeks before she was due. Teddy, her older sister, is making a video diary for Charlie to help her with their "special" family and some advice. She is currently 3 years old and in preschool. She spoke for the first time in Sleepless in Denver, but it seemed to have gone unnoticed by the family at that time. She is portrayed by Mia Talerico.
She is very cute, playful and mischievous like Gabe. She is known as a combination of all Duncan kids as having the sweetness of PJ, the intelligence of Teddy and the mischievousness of Gabe.
Charlie was the fourth child born to Bob and Amy Duncan. She is the youngest girl in the family. She was the baby in the family until Amy announced she was carrying the 5th baby. ("Good Luck Charlie, It's Christmas!").
Charlie's favorite show is The Gurgles. In fact, Teddy bought her tickets to The Gurgles Live just to get turned down. She also at one point had to watch The Gurgles to go to the bathroom ("Charlie Is 2!", "Let's Potty").
- Disney Wiki