All Saints are an English-Canadian girl group formed in London in 1993. They were founded as All Saints 1.9.7.5 by members Melanie Blatt, Shaznay Lewis and Simone Rainford. The group struggled to find commercial success upon being signed to ZTT Records and were dropped by the label shortly after Rainford left the group. In 1996, the group were joined by sisters Nicole and Natalie Appleton and signed to London Records under their shortened name.Part of the British girl group wave of the 1990s, their debut album, All Saints (1997), peaked at number two on the UK Albums Chart and went on to become the UK's third best-selling girl group album of all time. The album contained three UK number one singles: "Never Ever", "Under the Bridge"/"Lady Marmalade" and "Bootie Call". "Never Ever" is the second best-selling girl group single of all-time in the UK, behind the Spice Girls' "Wannabe". It also won two Brit Awards: Best British Single and Best British Video, and the group were nominated for Best British Breakthrough Act. Their second album, Saints & Sinners (2000), became their first UK number-one album and achieved multi-platinum success. It included the UK number one singles "Pure Shores" and "Black Coffee". Amid in-fighting among the group members, All Saints split the following year.
The group later reformed after signing to Parlophone Records to release their third album, Studio 1 (2006). However, the album bowed at number 40 in the United Kingdom and All Saints were dropped by their label shortly afterwards. Following a second split in 2009, the group reunited in 2014 for a series of live performances, prompting the group to release of Red Flag (2016), and Testament (2018). As of January 2016, All Saints have sold 12 million records.

Melanie Blatt and Shaznay Lewis started their career by singing backing vocals at Sarm West Studios, the ZTT recording studios near All Saints Road, London. In 1993, Blatt, Lewis and Simone Rainford were signed to ZTT Records, and music manager Ron Tom decided the trio should become a group. "One of the names was Spice, but we didn't think it was good enough" admitted Simone. Some of the others names they considered included Slinky and Shifty, but ended up calling themselves All Saints 1.9.7.5. after the recording studio and the year of their births. They were launched as a trio for their first time at the Touch Magazine stage at the Notting Hill Carnival. But the problems started generate when the trio could not decide on what kind of music they wanted to make. They released their first single in 1994, "Silver Shadow", but it was a failure. They released two singles together, "Silver Shadow" and "If You Wanna Party (I Found Lovin')", but they were not successful. Additionally, Rainford was not getting along very well with the other girls, and subsequently left the group in 1995, and the remaining duo was dropped by ZTT Records.Regardless, Blatt and Lewis set out to find a replacement for Rainford. Conducting many auditions, Blatt's father, a taxi driver at the time, met Nicole Appleton in May 1996 whom Blatt knew from her days at the Sylvia Young Theatre School. However, Blatt was too embarrassed to ask Appleton to join the band, so she left it to the normally shy Shaznay to ask her. "We gave her the low-down on everything and played her some demos, which she loved", she said. "She sang to me in the bathroom of a restaurant and we knew right away she'd be perfect. I was like, 'Cool! She can join!' And that was that". Nicole's older sister, Natalie Appleton, at first pondered with the idea of becoming the band's manager. However, it seemed natural that she should be a part of it, according to Lewis. Natalie had to be persuaded to join the band, because she did not want to leave her daughter Rachel whilst she was overseas. Then, her parents stepped in and offered to look after their granddaughter for her.

After forming a new group in May 1996, the four singers met with Karl "K-Gee" Gordon, a former band member of Outlaw Posse. The band began looking for a new record deal, but most record labels wanted to model them after the Spice Girls, who had become an international sensation by that time. The group relocated to London Records, where John Benson finalised the recording deal in November 1996. All Saints recorded their debut album, All Saints, with producers such as Cameron McVey, Magnus Fiennes, Karl "K-Gee" Gordon, John Benson, Johnny Douglas, and Nellee Hooper.
In mid-1997, the group's debut single "I Know Where It's At" broke them into the mainstream, reaching number four on the UK Singles Chart. Their second single, "Never Ever", was issued in November 1997 and launched them worldwide, peaking at number one in the UK and Australia. The single sold 1.2 million copies in the UK alone (receiving a double platinum certification from the British Phonographic Industry) and won the group two BRIT Awards in 1998: Best British Single and Best British Video. The album All Saints was released in November 1997, reached number two on the UK Album Chart, and was BPI-certified five times platinum in the UK for sales of 1.5 million. The third single from the album was the double A-side "Under the Bridge / Lady Marmalade", which became their second UK number-one single in May 1998, earning a gold certification for 400,000 copies sold. The same month, the album was re-released with a slightly different track listing. "Bootie Call", the fourth single, also went to number one, and the silver-certified "War of Nerves" (the fifth and final release) peaked at number seven, selling 200,000 copies.
The album achieved success in countries such as Australia (double platinum, selling 140,000 copies), Canada (triple platinum, 300,000 copies), and the United States, where All Saints was certified platinum by the RIAA for sales of one million and produced two top forty singles on the Billboard Hot 100: "I Know Where It's At" and "Never Ever". In November 1998, All Saints received the MTV Europe Music Award for Best Breakthrough Artist and performed at the ceremony, although Blatt was absent due to her pregnancy.

In February 2000, All Saints released the single "Pure Shores" as the soundtrack for the film The Beach, written by Shaznay Lewis and William Orbit, with the latter also producing the song. "Pure Shores" became their fourth number-one single in the United Kingdom and the second best-selling single of 2000, with 824,000 copies sold; The song won an Ivor Novello Award for Most Performed Work. Also in 2000, the Appleton sisters and Blatt made their film debut with Honest, which was directed by former Eurythmics member Dave Stewart. Honest is a black comedy set in Swinging London in the late 1960s, in which the singers playing three street-wise, saucy sisters who head "up West" to pursue a life of crime. The film received attention for the Appleton sisters topless scenes. Their performances were widely panned; one critic remarked, "It is the worst kind of rubbish, the kind that makes you angry you have wasted 105 minutes of your life watching it".In October 2000, All Saints released the single "Black Coffee", which became their fifth and final number-one single in the United Kingdom, selling 230,000 copies. This preceded the release of their second studio album, Saints & Sinners, which debuted at number one on the UK Albums Chart, eventually reaching double platinum certification in the United Kingdom for sales of more than 600,000 copies. The third and final single was "All Hooked Up" in January 2001, which peaked at number seven. The following month, All Saints announced that they were to take a break so that they "could clear the air between themselves". Melanie Blatt said later that year that it was uncertain if they would reform, citing their difficulties with the financial and business aspects of the group. Shaznay Lewis later explained that the catalyst for the break-up was a disagreement over who would wear a certain jacket for a photoshoot: "I would never in a million years have put money on the group ending over a jacket incident. But when that incident happened, it fired up so strong, it had to be over. And the way I was then, the state we'd got into then, there was no way she was getting that stupid jacket."In November 2001, London Records released a greatest hits compilation entitled All Hits. It contains the group's hit singles and Blatt's first solo single, "TwentyFourSeven", a collaboration with Artful Dodger. The album peaked at number eighteen on the UK Albums Chart and was later certified gold, selling 100,000 copies. In 2008, a slightly altered edition of the album was given away for free as part of a promotion with The Mail on Sunday.

On 24 January 2006, it was announced that the band had reformed and signed a record deal with Parlophone. They then began work on their third studio album, Studio 1. Its first single, "Rock Steady", released in November 2006, reached number three on the UK Singles Chart. Studio 1 entered the albums chart at number forty, falling significantly short of the success of "Rock Steady" and the group's previous releases; it received a Gold certification by the British Phonographic Industry (BPI). A second single, "Chick Fit", followed in February 2007, but promotional appearances and a physical release were cancelled and it failed to reach the top 200. It was subsequently reported that All Saints and Parlophone had parted ways and the group cancelled their planned UK tour. Blatt discussed the reunion's failure in an interview with i-D magazine in 2012: "I don't think it was done for the right reasons... I know that I did it for the money. We got signed before we had even made music again, it wasn't like we felt we had something to give back to the world... we were given an opportunity and took it, without really thinking about it too hard". She also said she never felt comfortable with the success the band had and that "it was not necessarily the plan at the beginning; there was a lot of compromise involved".In January 2008, Nicole Appleton and Melanie Blatt served as "hijackers" on E4's Big Brother: Celebrity Hijack, during which Blatt said that they had a record deal with an undisclosed company in a conversation with housemate Nathan Fagan-Gayle. The following month, in a press release for the Wideboys' single with Shaznay Lewis, titled "Daddy O", posted on the official website of All Around the World, it was stated that All Saints were recording in the studio and would be back with new material before the end of 2008. Because no record label was mentioned in the update, fans assumed that the group's new label was All Around the World. In September 2008, All Around the World discredited claims that All Saints had been signed with them with a post at their official website. In 2009, Melanie Blatt told the London Lite in 2009 that "All Saints are never getting back together again". Three months later, a second compilation album called Pure Shores: The Very Best of All Saints, was released. This two-disc collection features the group's hit singles alongside a selection of album tracks and B-sides.

On 25 May 2013, original All Saints member Simone Rainford died from kidney cancer a month after her 38th birthday in her home in Greenwich.In November 2013, it was announced that the group would be officially reforming for a second time to support the Backstreet Boys for five dates across the UK and Ireland in 2014. The same year, they performed at G-A-Y and V Festival. Blatt said in an interview that the group had no plans to record new material and were "just taking each day as it comes and doing it for pure enjoyment". On 27 January 2016, it was confirmed that All Saints would release their fourth studio album Red Flag on 8 April 2016. The lead single from the album, "One Strike", preceded the album on 26 February 2016.On 22 February 2016, All Saints announced their first headlining show in over a decade at London's KOKO. On 15 March 2016, the group announced their first headlining tour in 15 years in support of their 2016 comeback album, Red Flag. The Red Flag Tour would visit 10 British cities throughout October 2016, beginning in Newcastle upon Tyne and ending in Norwich. The group revealed that the tour set list would comprise all of their successful singles as well as some tracks from Red Flag.Red Flag debuted at number 3 on the UK Albums Chart. The group confirmed the second single from the album would be "This Is A War" and third would be "One Woman Man".
On 22 October 2016, it was announced that All Saints will support Take That on their UK & Ireland tour in May and June 2017.

On 19 March 2017, the group confirmed that recording had begun on their fifth studio album. As with their previous albums, Karl "K-Gee" Gordon was involved in the production, as well as William Orbit, who produced "Pure Shores" and "Black Coffee".On 29 May 2018, the group announced via their official Instagram account the name of their new album, Testament, along with its release date of 11 July 2018. The group's first single from the album, titled "Love Lasts Forever", was played exclusively on BBC Radio 2 on 31 May.

Musicians including Jessy Lanza, M.O, and Charli XCX have cited All Saints as an influence on their work. The group's influence on British fashion in the late 1990s has been noted, particularly their signature style of cargo pants in promotional imagery and live appearances.