Unfabulous is an American teen sitcom that aired on Nickelodeon. The series is about an "unfabulous" middle schooler named Addie Singer, played by Emma Roberts. The show, which premiered on September 12, 2004, was one of the most-watched programs in the U.S. among children between the ages of 10 and 16.^[1] It was created by Sue Rose, who previously created two animated series Pepper Ann (for Disney) and Angela Anaconda, and co-created the character Fido Dido with Joanna Ferrone. The series ended on December 16, 2007, with the final episode titled "The Best Trip Ever".

Most of the episodes are narrated by Addie, and are told in flashbacks. The show's theme song is performed by Jill Sobule, who also wrote the songs performed throughout the show.

Unfabulous's main character is a teenage girl named Addie Singer (Emma Roberts), who writes songs about her life in middle school. Her best friends are Geena Fabiano (Malese Jow), who is interested in fashion and designs her own clothes, and the environmentally committed school basketball player Zack Carter-Schwartz (Jordan Calloway). They all attend Rocky Road Middle School in an unspecified East Coast city. However, in episode 34 "The Birthday" when Addie receives a letter from when she was 7 years old the address is listed as "Pinecrest, PA". Addie's older brother Ben (Tadhg Kelly) works at Juice!, a smoothie bar where Addie and her friends often hang out after school.

Throughout the first season, Addie obsesses about her crush on Jake Behari^{[Note 1]} (Raja Fenske), who already has a girlfriend.

For the majority of the second season, however, Addie is dating Randy Klein (Evan Palmer). They break up towards the end of the season and Addie realizes that she still likes Jake. The made-for-TV movie Unfabulous: The Perfect Moment focused on Addie and Jake getting together although Jake will be gone for the rest of the summer in Canada.

In the third season, Addie and Jake finally begin dating and Geena and Zack begin to have feelings for each other.

The series aired on Nickelodeon and premiered in the United States on September 12, 2004. The final episode aired on December 16, 2007. After the series ended, reruns aired on TeenNick until 2015.

Unfabulous has also previously aired on Nickelodeon Canada and Nickelodeon Teen in France. As of 2021, the show is not available on Paramount+. However, it is available on the company's free streaming Pluto TV counterpart.

TEENick Picks, Volume 1 released on April 18, 2006 – features "The Little Sister" (Season 1, Episode 11)

Along with the start of the second season in September 2005, Nickelodeon also began selling different types of Unfabulous-related merchandise, beginning with the album Unfabulous and More (see Soundtrack below). In November 2005, the album was followed by two books tying into the show, Keepin' It Real (ISBN 0-439-79666-0) and Split Ends (ISBN 0-439-80179-6), both written by Robin Wasserman, and the first items in a line of clothes based on Addie's wardrobe on the show.^[17] Four more books were released in February 2006, Starstruck (ISBN 0-439-83157-1), Jinxed! (ISBN 0-439-83158-X), Meltdown and Just Deal. The last book released in 2007 was based on the two-part episode, The Perfect Moment, by Samantha Margles. The books are narrated by Addie herself in her own words depicting each storyline.

Before the launch of the third season, a video game based on the show was released for the Game Boy Advance by THQ on September 25, 2006.^[18]

All episodes from the first and the second season (including The Perfect Moment) were available for download in the iTunes Store in the U.S. since fall 2006, but are now not available anymore. They have since been put back for download as of 2012.