Glee (stylized as glee) is an American jukebox musical comedy-drama television series created by Ryan Murphy, Brad Falchuk, and Ian Brennan for the Fox Broadcasting Company. Taking place at the fictional William McKinley High School in Lima, Ohio, the series focuses on the New Directions, a glee club competing in the show choir circuit, as its disparate members deal with social issues regarding sexuality, gender, race, family, relationships, and teamwork.

The initial twelve-member cast included Matthew Morrison as Will Schuester, Jane Lynch as Sue Sylvester, Jayma Mays as Emma Pillsbury, and Jessalyn Gilsig as Terri Schuester. The remaining cast portrayed students, with Dianna Agron as Quinn Fabray, Chris Colfer as Kurt Hummel, Kevin McHale as Artie Abrams, Lea Michele as Rachel Berry, Cory Monteith as Finn Hudson, Amber Riley as Mercedes Jones, Mark Salling as Noah Puckerman, and Jenna Ushkowitz as Tina Cohen-Chang. Later additions included Naya Rivera as Santana Lopez, Harry Shum Jr. as Mike Chang, Heather Morris as Brittany Pierce, Chord Overstreet as Sam Evans, and Darren Criss as Blaine Anderson.

First conceived by Brennan as a feature film, Glee was primarily written by him, Murphy, and Falchuk in the first two seasons; Murphy and Falchuk also served as the series' initial directors. The pilot episode premiered on May 19, 2009, and the first season aired from September 9, 2009, to June 8, 2010. Subsequent seasons aired from September through May, while the sixth and final season aired from January to March 2015. Glee features on-screen musical performances chosen by Murphy and produced by Adam Anders and Peer Åström, ranging from show tunes to chart hits. Songs covered in the series were released through the iTunes Store during the week of broadcast, and several Glee albums have been released by Columbia Records. The series' music has been commercially successful, with over 36 million digital single sales and 11 million album sales worldwide through October 2011. Other merchandise includes DVD and Blu-ray releases, an iPad application, and karaoke games for the Wii console. The cast embarked on live concert tours after filming the first and second seasons; a concert film based on the 2011 tour, produced by Murphy and directed by Kevin Tancharoen, was given limited theatrical release in August 2011.

Glee received generally favorable reviews from critics in its first season, while reception to the later five varied. Among its many accolades, it won six Primetime Emmy Awards (including acting wins for Lynch and guest stars Neil Patrick Harris and Gwyneth Paltrow, along with Murphy's direction of the pilot), four Golden Globe Awards (including two consecutive awards for Best Television Series – Musical or Comedy and acting wins for Lynch and Colfer), and the 2009 Screen Actors Guild Award for Outstanding Performance by an Ensemble in a Comedy Series. In 2011, Fox chose the show to fill the coveted time slot following the network's coverage of Super Bowl XLV.

In 2013, following Cory Monteith's death and the airing of his tribute episode "The Quarterback", Murphy announced that the sixth season would be the series' last. After 121 episodes and over 729 music performances, Glee concluded on March 20, 2015.