[post_page_title]Bridgit Mendler playing Teddy Duncan[/post_page_title]
Charlie’s older sibling and only sister, Teddy is the one who decides to start making a video diary for the child to watch when she’s older.
She worries that she won’t be around much to give Charlie the advice she needs once she’s a teenager, so she uses the diary to impart valuable advice for making it through her adolescent years. The responsible member of the family, Teddy is often referred to as “GG,” or “goody-goody” by her friend, Ivy, though that doesn’t stop her from occasionally getting into trouble.