Teddy R. Duncan (Bridgit Mendler), Charlie's only sister, is the second-oldest Duncan sibling. Feeling that she will not be around as much when Charlie is grown, she produces and directs video diaries for her, hoping they will give her advice that will help her be successful as a teenager. She produces these video diaries at the end of every episode, and at the end of every video diary she says "Good luck Charlie". Her best friend is Ivy Wentz. It was mentioned in "Sun Show: Part 1", that her parents were expecting a boy, hence the generally masculine name "Teddy". She dated Spencer Walsh in season one, but they broke up after she caught him two-timing both her and a pretty, dim-witted brunette named Skyler, breaking her heart. She and Skyler later become friends. She and Spencer get back together in season two. Throughout the show Teddy has had numerous boyfriends. Teddy shows much care towards her brothers, such as saving PJ from falling out of the treehouse window, or offering to help Gabe deal with Jo, who has given him a black eye. Teddy's best friend Ivy often calls her G.G. for "goody-goody." She and Spencer get back together in "Can You Keep A Secret?". In "All Fall Down" Teddy and Spencer break up because they don't want to be in a long-distance relationship while Spencer attends the Boston Institute for Performing Arts (BIPA). But when Bob's newest employee Beau admits that he likes Teddy, they begin dating. The two break up when he decides to move home. In "Accepted", Teddy finds out that she is on the waiting list for Yale after Victor; later she is accepted. Later in the last episode, Spencer and Teddy get back together and kiss, and she shoots the final entry in her video diary before leaving for Yale. It was never revealed what her middle initial "R" stands for.
Lists Featuring Teddy Duncan
Best Bridgit Mendler Portrayals Most Inspiring Disney TV Characters
Best Good Luck Charlie Kids Disney Channel Characters You Want to Punch In the Face
Best Disney Live-Action Series Characters Top 10 Best Female Characters from TV Shows
Best Characters from Live Action Television Shows Best Live Action Disney Channel, Nickelodeon and Disney XD and Freeform Characters of All Time