Beverly Hills, 90210 (often referred to as 90210) is an American teen drama television series created by Darren Star and produced by Aaron Spelling via his production company Spelling Television. The series ran for 10 seasons on Fox from October 4, 1990, to May 17, 2000, and is the first of six television series in the Beverly Hills, 90210 franchise. The series follows the lives of a group of friends living in Beverly Hills, California, as they transition from high school to college and into the adult world. "90210" refers to one of the city's five ZIP codes.

The initial premise of the show was based on the adjustment and culture shock that twins Brandon (Jason Priestley) and Brenda Walsh (Shannen Doherty) experienced when they and their parents, Jim (James Eckhouse) and Cindy (Carol Potter), moved from Minneapolis, Minnesota, to Beverly Hills, California. In addition to chronicling the characters' friendships and romantic relationships, the show addressed topical issues such as sex, date rape, homophobia, animal rights, alcoholism, drug abuse, domestic violence, eating disorders, racism (including antisemitism), teenage suicide, teenage pregnancy, and AIDS.

After poor ratings during its first season, the series gained popularity during the summer of 1991, when Fox aired a special "summer season" of the show while most other series were in reruns. Viewership increased dramatically, and 90210 became one of Fox's top shows when it returned that fall. The show became an international pop culture phenomenon with its cast members, particularly Priestley and Luke Perry, who became teen idols; the series also made actresses Doherty and Jennie Garth household names in the United States. The show is credited with creating or popularizing the teen soap genre that many other successful television shows followed in the years to come.

The show had many cast changes; Garth, Tori Spelling, Brian Austin Green, and Ian Ziering were the only actors to appear during its entire run and appeared on the first episode of the spin-off Melrose Place. On February 27, 2019, it was announced that a six-episode reboot had been ordered by Fox and that the show would simply be titled BH90210. The revival premiered on Fox on August 7, 2019, and was cancelled on November 7, 2019.

The series begins with the introduction of the Walsh family—Jim, Cindy, Brandon, and Brenda—who have recently moved from Minneapolis, Minnesota, to Beverly Hills, California, as a result of Jim's job promotion. In the first episode, Brandon and Brenda begin attending West Beverly Hills High School, where they befriend several classmates: the self-centered and promiscuous Kelly Taylor, carefree and spoiled Steve Sanders, smart and driven Andrea Zuckerman, ditzy and virtuous Donna Martin, brooding loner Dylan McKay, and younger and naive students David Silver and Scott Scanlon. The show follows the siblings as they bear witness and take part in the dramatic lives that their wealthy and privileged peers lead.

Torand Productions was used by the production company for several seasons on the show. "Torand" is derived from the first several letters of Aaron Spelling's first and second children, Tori and Randy.^{[citation needed]}

The original name for the show, used during shooting of the original pilot in March and April 1990, was Doing Time in Beverly Hills; later, the tentative title for the show changed to Class of Beverly Hills. The show's episodes were issue-based until the producers decided it should become a teen soap opera. In the first season, the teenage characters (aside from David Silver and Scott Scanlon) were said to be in the eleventh grade, but due to the success of the show, their ages were retconned to be one year younger in the second season, making them tenth graders in the first.

Jennie Garth had to audition five times for the role of Kelly Taylor and was the first to be cast on the show. Gabrielle Carteris felt that she was too old to play a high school student. She first auditioned for Brenda because she thought that being a real-life twin would help her chances, but the producers felt that she would be better for the part of Andrea. Alicia Silverstone was offered an unspecified role, but she turned it down to focus on a film career instead.