|Age|| 15-16 (Season 1)
16-17 (Season 2) 17-18 (Season 3) 18-19 (Season 4)
Teddy R. Duncan (Bridgit Mendler) is Charlie's older and only sister and the second oldest of the Duncan children . Feeling that she will not be around as much when her baby sister Charlie is grown, she produces and directs video diaries for her, hoping that it will give her advice that will help her be successful as a teenager at the end of every episode and at the end of every video diary she says 'good luck charlie'. Her best friend is Ivy WentzShe is usually a straight-A student. It was mentioned in Sun Show(part 1) that her parents were expecting a boy, hence the generally name Teddy She dated Spencer Walsh in Season 1 but they broke up after she caught him hanging around with a pretty, dim-witted brunette named Skyler, breaking her heart. She and Skyler later become friends despite Teddy and Ivy,being annoyed by her at times because of her dumbness but they get used to it, as it is in her nature. She and Skyler also compete in a Battle of the Bands contest, but when Skyler and PJ get together, they combine the two bands together, winning the contest. She and Spencer later get back together in Season 2 where Spencer kisses her and says that hurting her was the stupidest thing he's ever done. Throughout the show Teddy has had numerous boyfriends including Derek, a very relaxed guy with a motorbike who could be quite ditzy sometimes; and Evan, a boy that Teddy once liked until she realized that he was into Pokeo - a little kids card game and dumps him because of this in a L.A.R.P. (live-action role play) in the park. Teddy shows a lot of care towards her brothers, as demonstrated when she saves PJ from falling out of a tree house window on the condition of him needing to drive her where ever she wanted for a month, or when Gabe gets a black eye from Jo and Teddy offers to help him with his problem. Teddy is known as a "goody-goody" (G.G.) from her best friend Ivy It is revealed in Bye-Bye Video Diary that the reason she wants Charlie to have video diaries with advice in them, because she wants Charlie to grow up to be a good girl. She and Spencer get back together in Can you Keep A Secret?. In All Fall Down Teddy and Spencer have to break up because Spencer is going to go to the Boston Institute for Performing Arts and they don't want to be In a "long-distance relationship".