My Chemical Romance (commonly abbreviated to MCR or My Chem) is an American rock band from New Jersey. The band's current lineup consists of lead vocalist Gerard Way, lead guitarist Ray Toro, rhythm guitarist Frank Iero, and bassist Mikey Way. They are considered one of the most influential rock groups of the 2000s and a major act in the pop-punk and emo genres, despite the band rejecting the latter label.

Founded in September 2001 by Gerard, Mikey, Toro, and drummer Matt Pelissier (and later joined by Iero), the band signed with Eyeball Records and released their debut album, I Brought You My Bullets, You Brought Me Your Love, in 2002. They signed with Reprise Records the next year and released their major-label debut, Three Cheers for Sweet Revenge, in 2004. Shortly after the album's release, Pelissier was replaced by Bob Bryar. The album was a commercial success, attaining platinum status over a year later.

The success of the band's previous albums was eclipsed by that of their 2006 rock opera concept album, The Black Parade. A major commercial success, its lead single "Welcome to the Black Parade" topped the UK singles chart. The album solidified the band's following, despite negative coverage in the Daily Mail generating controversy. The band's fourth studio album, Danger Days: The True Lives of the Fabulous Killjoys, was released in 2010. Bryar departed the band prior to the release of the album, and in 2012, they added touring keyboardist James Dewees. In 2012 and 2013, the band released a series of singles they had recorded in 2009 under the collective title Conventional Weapons. My Chemical Romance announced its breakup on March 22, 2013. In 2014, a greatest hits album titled May Death Never Stop You was released and a tenth-anniversary reissue of The Black Parade was released in 2016.

On October 31, 2019, the band announced a reunion show, which took place in Los Angeles on December 20, 2019. In January 2020, they announced additional shows and a Reunion Tour, which commenced in 2022 after a two-year postponement due to the COVID-19 pandemic and concluded in early 2023.