The original band members were as follows:
Later that year the breakthrough came with the single "Live Forever," which was a major hit in Britain. It reached the top 10 and spent a year on the chart. Soon after, Oasis released its first album, Definitely Maybe, which became the biggest selling-debut albums in British history, entering the charts at number one. It later became a major hit throughout the world, with Oasis gaining recognition in America.
In 1995 Oasis released its second album, (What's the Story) Morning Glory, which became a worldwide success. In Britain, it became the fastest selling-album since Michael Jackson's Bad. On the eve of the album's release, drummer Tony McCaroll left the band and was replaced by Alan White.
The album spawned several hit singles including "Some Might Say," "Roll With It," "Wonderwall," and "Don't Look Back in Anger," all four of which reached either #1 or #2 in the British charts. The album also made the members of Oasis international stars. In 1996, Morning Glory became the second most significant British album in history.
The stormy relationship between the Gallagher brothers became the subject of newspaper gossip columns and tabloids.
In 1997 Oasis released its third album Be Here Now which launched the hit single "D'You Know What I Mean". This album, although a huge success, was less well-received than the band's previous albums. A backlash set in, with some critics labelling the music "derivative" and "samey." The album failed to sell as well as their previous albums.
Oasis dropped out of the limelight for several years. In 1999, while Oasis was recording its fourth album, guitarist Paul Arthurs left the band. Two new members, Andy Bell and Gem Archer, joined. Oasis's fourth album, Standing on the Shoulder of Giants, was released in 2000. Their fifth album, Heathen Chemistry, was released in 2003 to more positive reviews.