My Chemical Romance is an American rock band from New Jersey, formed in 2001. The band consists of lead vocalist Gerard Way, guitarists Ray Toro and Frank Iero, and bassist Mikey Way. Shortly after forming, the band signed to 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; the album was a commercial success, selling over one million copies. The band eclipsed their previous success with their 2006 concept album, The Black Parade, which gained generally favorable reviews among music critics. They have since finished recording their fourth studio album, the title of which continues to go unannounced. No release date for this album has been confirmed.

The band was formed by frontman Gerard Way and drummer Matt Pelissier approximately one week after the September 11 attacks. Witnessing the planes crash into the World Trade Center influenced Way's life to the extent that he decided to start a band. Way wrote the song "Skylines and Turnstiles" to express his feelings about September 11 and shortly thereafter, Ray Toro was recruited because at the time Way couldn't sing and play the guitar at the same time. The name of the band was suggested by bass guitarist Mikey Way, younger brother of Gerard, who was working in a library when he was struck by the title of a book named "Ecstacy: Three Tales of Chemical Romance". The first recording sessions were undertaken in Pelissier's attic, where the songs "Our Lady of Sorrows" (formerly called "Bring More Knives") and "Cubicles" were recorded. The band refers to those sessions as The Attic Demos. After hearing the demo, Mikey Way decided to join the band after dropping out of college. While with Eyeball Records, the band met Frank Iero, the lead vocalist and guitarist for Pencey Prep. Following Pencey Prep's split in 2001-02, Iero became a member of My Chemical Romance, just days prior to the recording of the band's debut album. They recorded their debut album, I Brought You My Bullets, You Brought Me Your Love, just three months after the formation of the band and released it in 2002 through Eyeball Records. Despite only joining the band a few days before the album recording sessions began, Iero played guitar on two of the tracks, one of which being "Early Sunsets Over Monroeville." During this time, the band was booked at the infamous venue, Big Daddy's, where they began to receive more attention.

My Chemical Romance offered free downloads through PureVolume and the social networking website MySpace, where they gained an initial fan base.

In 2009, My Chemical Romance released a new single entitled "Desolation Row" (a cover of the Bob Dylan song) on February 1, 2009. It was recorded to feature as the end credit track for the 2009 film Watchmen, an adaptation of the graphic novel of the same name. It was then announced by the band that they would be releasing "a collection of nine never-before-seen live videos, straight from the encore set of the Mexico City show from October 2007", entitled ¡Venganza!. The release was stored on a bullet-shaped flash drive and also contained exclusive photos of the band from the show. It was released on April 29, 2009.

On their website, on May 27, 2009, their web designer Jeff Watson announced that they were headed to the studio to record their fourth full-length album for the following few weeks with producer Brendan O'Brien, who has worked with AC/DC, Mastodon, and Pearl Jam.

In an interview with NME, Gerard Way said the band's next record would be a rock album, saying, "I think (the next album) will definitely be stripped down. I think the band misses being a rock band." In a separate interview with Idiomag, Way commented that the next release would be less theatrical in scope, stating that "it's not going to be hiding behind a veil of fiction or uniforms and makeup anymore." In an interview with PopEater, Way also stated that the next album will be "full of hate." He has also said "Over the years that we've been hearing ourselves live and hearing us on records, we kind of prefer the live. There's more of a garage feel and more energy. I'd like to capture some of that, finally. That's the goal for the next one."

On July 31 and August 1, 2009, My Chemical Romance played two "secret" shows at The Roxy Theater in Los Angeles, the shows being their first concert the band has played since Madison Square Garden, in May 2008. The band also premiered several new songs said to be from their upcoming fourth album during the shows, one reportedly titled "Death Before Disco", a song front-man Gerard Way has noted he is particularly excited about. Way explained further in a Rolling Stone interview that "It's a completely different sound for the band — it's like an anti-party song that you can party to. I can't wait for people to hear it. It brings back, lyrically, some of that wonderful fiction from the first album.

Gerard Way also said in a November 2009 interview with Rock Sound that the fourth album would be their defining work. "A friend who heard the record recently said he now had no interest in listening to our older work anymore, that we had made all our old material redundant. I took it as a compliment, the next thing you should always make the last thing seem unimportant and I think that will happen when we finally release this album."

My Chemical Romance's general style has been categorized as "alternative rock","post-hardcore", "punk revival","pop punk" and, most controversially, "emo". The band's official website describes their music as simply "rock" or "violent, dangerous pop". Band frontman Gerard Way has publicly rejected the term "emo", describing the genre as "fucking garbage". However, Way has reportedly also described the band's style as "What-else-ya-got-emo".

Way said to Rolling Stone, "We love bands like Queen, where it's huge and majestic, but also bands like Black Flag and the Misfits, who would go absolutely crazy." Way has also said that his band patterns their career after that of The Smashing Pumpkins, another band they admire. Growing up, they were also very influenced by horror films and comic books, and therefore their music, lyrics, and image all have overt elements of fantasy, horror, and theatricality.