<Dd> 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 do n'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 . </Dd>
<Dd> 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 do n'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 . </Dd>
who is the girl that plays in good luck charlie
who is the girl that plays in good luck charlie
Bridgit Mendler
Bridgit Mendler