<P> The events in each episode become material for a video diary that Teddy is making for Charlie . Teddy hopes the videos will provide useful advice for Charlie after they have both grown up and Teddy has moved out . At the end of each video, she (and / or other cast members) says, "Good luck, Charlie" or may even say it indirectly such as "Wish them good luck, Charlie ." During the movie, Amy reveals to Teddy that she is pregnant with her fifth child, but this story plot is not brought into the series until the third season, during which Amy gives birth to a baby boy, Toby . Each episode ends, after the video diary, with an event that is weird and usually cannot happen in real life . </P> <Dl> <Dt> Teddy Duncan </Dt> <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 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 . </Dd> <Dt> Amy Duncan </Dt> <Dd> Amy B. Duncan--(née Blankenhooper) (Leigh - Allyn Baker) is Bob's wife and the mother of PJ, Teddy, Gabe, Charlie, and Toby . She worked as a hospital nurse and is often portrayed as dutiful, protective and comedic . She loves her family and does everything to care for and protect them . She appears out - of - her - element when she isn't nurturing them, especially Charlie, but as the series progresses, she begins to feel assured that her youngest children are in good hands and trusts that her husband and 3 eldest children can look after Charlie and Toby . She is notoriously conceited and enjoys bragging about her accomplishments, be they admirable, real, or otherwise . Amy used to be on the local news team and was also a poet in her high - school days . A running gag on the show is that she was involved in virtually every extracurricular activity at Southwest Denver Community College but still earned a nursing degree . She lets special opportunities, such as being on TV or singing in front of a group, go to her head . She has a habit of taking any chance of any publicity that may shine on her family to focus onto her, but this never works out well; usually she ends up being cut from the project or tossed out of certain groups . Amy seldom accepts her children's misbehavior . It is revealed in the movie, that she is pregnant again with her fifth child . In the middle of the third season, Amy quit her nursing job to be a stay - at - home mother to Charlie and Toby . In the final episode, Amy is chosen to be the new anchor on "Good Morning, Denver", thanks to Charlie calling in during her on - air audition . </Dd> <Dt> Gabe Duncan </Dt> <Dd> Gabriel "Gabe" Duncan (Bradley Steven Perry) is the middle Duncan sibling, being both the younger brother of Teddy and PJ and the older brother of Charlie and Toby . From the beginning Gabe doesn't approve of Charlie's arrival and is the last one of the family to get used to her, but finally he reaches the point of reluctantly assisting in her care and demonstrating some fondness of her . He is a prankster and troublemaker, often sarcastic and lazy, but can also be dutiful and determined at times . He is front - man when it comes to the Duncans' running rivalry with their neighbor Mrs. Dabney, who is often the target of Gabe's pranks and stunts--which is the only time the family doesn't mind them . Although he doesn't like Mrs. Dabney, he ends up dating a relative of Mrs. Dabney, Lauren . He and Toby are the only brown - haired Duncans; all of the others are blondes . A running gag in the show is that he insults Bob's weight and baldness, Amy's cooking, PJ being a goofball, Teddy being a "goody - goody," and occasionally Charlie . He also likes to harass and tease Mrs. Dabney, whom he finds annoying . He also won the right to name his baby brother Toby; in one episode, he tried to impress a girl by making video diaries for Toby, ending them with "Good Fortune, Toby!". It has been revealed that Gabe was a calm and docile baby . </Dd> <Dt> Charlie Duncan </Dt> <Dd> Charlotte "Charlie" Duncan (Mia Talerico) is the title character and the second - youngest Duncan sibling . She is generally portrayed as being happy . It sometimes takes a few tries to get her to do the right thing . Charlie can also be mischievous at times . Many of the Duncan family's adventures revolve around Charlie . Both her older brothers, PJ and Gabe, are often seen using Charlie for their own benefit, although PJ shows that he cares about her deeply . Gabe seems to dislike Charlie the most although, in some episodes, he is seen being quite fond of her . Amy thinks of Charlie as the perfect baby . It was revealed in "Charlie is 1", that it was Teddy's idea to nickname her Charlie . Charlie speaks more often in later episodes of seasons two and three . Toby was born on her birthday; she responded to this by "I like this present ." In season three, her personality begins to develop, as she is seen as sneaky and mischievous, such as pretending to like a doll Amy bought for her to like Toby, then throwing it away when she was not looking; and also telling Amy's "friends" what she really thinks of them, causing her to lose them all . Also, she can be seen as not liking Toby as in the episode "Doppel Date" when she asks Bob if Toby is going to stay at the hotel and he says no and Charlie asks if they can talk about it . </Dd> <Dt> Bob Duncan </Dt> <Dd> Bob William Duncan (Eric Allan Kramer) is the father of Teddy, PJ, Gabe, Charlie, and Toby, and husband of Amy . He owns a pest control company, "Bob's Bugs Be Gone". He sometimes refers to his business as the "Triple B-G". He loves bugs and attends the Bug Convention every year . Bob is the coach of Gabe's basketball team, but he was temporarily replaced by his wife . It is also mentioned in "Snow Show: Part 1" that Bob and Amy are not legally married because they were scammed by a con man who impersonated a judge; they have a legal ceremony with all 4 children present . His childhood dream was to be a professional wrestler named "Bobzilla", which he showed in his company's commercial . Bob gets made fun of a lot throughout the series because of his weight and baldness, usually by Gabe . He is barely more intelligent than the bugs he kills, and breeds much resentment among his kids by being very "cheap" and "tight" with his money . He wants his family to know him as a "fix - it" man, though his projects never seem to work out . He is slightly afraid of Amy, but he calls it a "strong respect". He has two positions of authority when it comes to the children: driving lessons and barbecuing . He can be lazy but is determined to spend quality time with his wife and children . He has issues with his mother - in - law, Petunia . It is revealed he has apologized to Amy at least 162 times, while Amy just soaks it up . In "Baby Steps," it is revealed that he dropped all of his kids including Toby . In multiple episodes Bob brags about having his own band in high school, "The Bob Duncan Experience", which made a grand total of one record (an LP, no copies). He can still play bass guitar and occasionally sits in with PJ & The Vibe . Late in the third season, Bob began exercising and dropped a massive amount of fat, replacing most of it with muscle . After Amy and the kids staged an intervention to stop his more - revealing wardrobe choices, he admits the catalyst for his getting back in shape was someone in the park mistaking him for Toby's grandfather . It is revealed in "Amy Needs a Shower" that his middle name is William . In the final episode, PJ's culinary talents motivates Bob to pry open his wallet and invest in his son's business . </Dd> <Dt> PJ Duncan </Dt> <Dd> PJ Duncan (Jason Dolley) is the eldest Duncan sibling . He and Teddy often fight, although they care about each other, and he usually gets along well with his younger brother Gabe . He often appears awkward, somewhat careless, and childish, but on numerous occasions has been known to be resourceful, creative, and intelligent . He has also been shown to be a good cook, and Bob once tricked Amy (who isn't a very good cook) into working later so that PJ would cook . He and his best friend Emmett have their own band entitled "PJ and the Vibe". PJ occasionally uses his younger sister Charlie for his personal gain, like when he uses her to make big tips while working for Kwikki Chikki by saying that his mother was in the hospital when she actually worked there (customers just assumed she was ill). He dated Teddy's friend Skyler, who has his type of scatterbrain, but they broke up in "PJ in the City", when Skyler had to move to New York City because of her father's new job . He was originally intended to be named after his great - grandfather, Patrick John, but Bob was nervous as he was writing on his birth certificate, resulting in the legal name of "Potty John" instead of the intended "Patty John". Despite Bob trying to correct this in the season two episode "Can You Keep a Secret?", he accidentally changed the intended name to "PP Duncan". It is revealed in the "Special Delivery" episode that his middle name is Darth . In season three, PJ moves into an apartment shared with Emmett, but is still in the Duncan house a lot . In the season - four episode "Good Luck Jessie: NYC Christmas" he gets back together with Skyler, who will be attending college in Denver . In the final episode, PJ has graduated cooking school, buys a food truck, hires Emmett to work for him, and makes Bob his business partner . Also in the last episode, PJ finds Skyler in Denver, who forgot to mention she moved back to Denver to go to college . </Dd> </Dl> <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 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 . </Dd> <Dd> Amy B. Duncan--(née Blankenhooper) (Leigh - Allyn Baker) is Bob's wife and the mother of PJ, Teddy, Gabe, Charlie, and Toby . She worked as a hospital nurse and is often portrayed as dutiful, protective and comedic . She loves her family and does everything to care for and protect them . She appears out - of - her - element when she isn't nurturing them, especially Charlie, but as the series progresses, she begins to feel assured that her youngest children are in good hands and trusts that her husband and 3 eldest children can look after Charlie and Toby . She is notoriously conceited and enjoys bragging about her accomplishments, be they admirable, real, or otherwise . Amy used to be on the local news team and was also a poet in her high - school days . A running gag on the show is that she was involved in virtually every extracurricular activity at Southwest Denver Community College but still earned a nursing degree . She lets special opportunities, such as being on TV or singing in front of a group, go to her head . She has a habit of taking any chance of any publicity that may shine on her family to focus onto her, but this never works out well; usually she ends up being cut from the project or tossed out of certain groups . Amy seldom accepts her children's misbehavior . It is revealed in the movie, that she is pregnant again with her fifth child . In the middle of the third season, Amy quit her nursing job to be a stay - at - home mother to Charlie and Toby . In the final episode, Amy is chosen to be the new anchor on "Good Morning, Denver", thanks to Charlie calling in during her on - air audition . </Dd>

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