The Baby-Sitters Club is a series of children's books, written by Ann M. Martin and published by Scholastic between 1986-2000, which sold over 175 million copies.

The series is about a group of middle school students living in the fictional town of Stoneybrook, Connecticut. They run a business called the Baby-sitters Club that helps parents find babysitters from the club available for jobs by calling during their club meetings. Meetings take place Monday, Wednesday and Friday from 5:30 to 6:00 p.m. The club runs financially on dues and fundraising, and the babysitters write diaries of their jobs to help each other. The members of the club are also best friends, although they go through many conflicts throughout the series.

The club starts out with four members (Kristy Thomas, Mary Anne Spier, Claudia Kishi, and Stacey McGill), eventually expanding to ten. All of the main characters are thirteen, with the exception of junior members Mallory Pike and Jessica Ramsey, who are two years younger. When the club was founded (in 1986), the four members were in the seventh grade, but ten books later (1988), they are promoted to the eighth grade. From there, they are frozen in time until the very end of the series (2000), in which they graduate from middle school.

The Baby-Sitters Club is a 1990 American children's television series based on Ann M. Martin's children's book series of the same name. The series originally aired on the The Disney Channel, but was also broadcast on HBO and Nickelodeon; all thirteen 30-minute episodes were also released to home video. The TV series and the books were both produced by Scholastic Corporation.

Kristy Thomas, a thirteen-year-old tomboy, and President of the Babysitter's Club, comes up with an idea to open a day camp for their child clients. Her best friend, Mary Anne Spier along with stepsister Dawn Schafer, offer their parents' back yard to serve as the camp site. All of the club members (Kristy Thomas, Mary Anne Spier, Dawn Schafer, Claudia Kishi, Stacey McGill, Mallory Pike, and Jessi Ramsey) vow to keep a close eye out for misbehaving kids, which would later include Kristy's younger brother, David Michael.

Meanwhile, Kristy faces problems when she meets her estranged father (who abandoned her family seven years ago), and faces a dilemma about telling her friends and family about this. Mary Anne is the only one she tells of the visit, and she too is under pressure as the curiosity of her friends grows. Claudia is stuck in summer school and is forced to retake a test, or face repeating a grade and being forced to drop out of the club. Stacey McGill has a crush on a seventeen-year-old boy, Luca. As their relationship ensues, she faces problems telling him about her diabetes and later, her age. This is revealed after a fateful trip to a New York City club, in which a bouncer does not allow her into a club because she is underage. Luca is outraged, unable to believe that Stacey is thirteen years old. Meanwhile, Dawn must face her neighbor, the fiery Mrs.Haberman, who becomes increasingly upset because of the camp activities that are taking place next door. Also, Mallory is in the process of writing her first novel while Jessi continues to dance her way through life and closer to her dream of becoming a professional dancer.

At the end of the movie, it is Kristy's thirteenth birthday and she has arranged to go to an amusement park with her father. Promising her friends she would make it to her own party, Kristy goes to meet her father, but he does not show up. She begins to walk home until her friends show up in Luca's car after Mary Anne's confession about the return of Kristy's father. Luca drives the girls back to Mallory's parents' cabin and present Kristy with a half-melted birthday cake. As Stacey is saying good-bye to Luca, he tells her that he will be coming to Stoneybrook again next year. Delighted, Stacey tells him that she will be fourteen when he returns. They share a kiss just before Luca departs. At the end of the movie, the girls, in return for making Mrs.Haverman's summer so miserable with their summer camp, give the greenhouse to her. Meanwhile, Kristy witnesses a miracle when Jackie Radowsky hits his first home run, nailing Cokie, who is sitting in a tree nearby, in the process.