Westlife member Nicky Byrne is married to Georgina Ahern, daughter of Irish prime minister Bertie Ahern.
Nicky is known for his husky voice, Mark has a soulful voice, and Bryan supplies a plaintive voice.
Boyzone singer Ronan Keating was brought in to co-manage the band with Walsh.
Although the band has enjoyed unprecedented success in the Irish singles chart, many detractors argue it has been achieved by releasing bland unmemorable ballads and cover versions into a declining singles market.
Westlife is primarily marketed to teenage girls, but they also have a large following of male fans and have performed numerous times at gay venues in the UK.
Mark Feehily put to rest years of speculation among fans that he was gay by publicly coming out of the closet in the UK tabloid The Sun, and announced his relationship with Kevin McDaid of the former boy band V.
Bryan McFadden left the band on 9 March 2004 to devote more of his time to his family life with the British TV personality and former Atomic Kitten member Kerry Katona, although he has subsequently separated from her and reverted the spelling of his first name back to its original 'Brian'.
Westlife would also collaborate with Asian-music sensation, BoA, on a Korean language version of the song which would appear on her mini-album, Shine We Are!
The original Westlife hit most known to American audiences is "Flying Without Wings", since it was later a success for American Idol winner Ruben Studdard.
Westlife's debut single and music video "Swear It Again" was released in the US in Summer 2000 and was a minor hit on mainstream radio and MTV, reaching number 20 on the Billboard Hot 100 and being shown briefly on MTV's Total Request Live.
Westlife have not managed success in the United States.
Westlife have had record-selling indoor arena tours and are one of the biggest pop acts to come out of Ireland.
Westlife's fan base is global: they have had success all over the world, especially Scandinavia and South East Asia, but also elsewhere in Europe, Canada, Latin America, South Africa and Australia.
Kian is a multi-instrumentalist who has a distinctive rock voice.
Shane is the group's lead singer, using a commercial pop style, and does some songwriting.
Westlife were discovered by Louis Walsh, the manager of 1990s boy band Boyzone.
The bands' origins are in Sligo in northwest Ireland, where Filan, Egan, and Feehily were in a six-member vocal group named IOU, which put out a single called "Together Girl Forever".
Westlife was formed in July 1998, with the members Shane Filan, Kian Egan, Mark Feehily, Nicky Byrne, and Bryan McFadden.
Westlife has collaborated with the Asian successful band, BoA, to record a Korean cover of Westlife's hit Flying Without Wings. The song was featured on BoA's mini album Shine We Are.
Westlife is currently formed of 4 members: Shane Filan, Nicky Byrne, Mark Feehily, and Kian Egan. The fifth member, Brian McFadden, has left the band in 2004, in order to be with his wife.
Westlife holds the record of the most successful debut in the British Singles Chart: Their first 7 singles entered #1: Swear It Again, If I Let You Go, Flying Without Wings, I Have A Dream / Seasons In The Sun, Fool Again, Against All Odds, and My Love.
Westlife has managed to release 12 singles that reached the #1 in the British Singles Chart.
Westlife's co-manager was Ronan Keating, Boyzone's vocalist and a solo artist by his own.
Westlife's original manager was Louis Walsh, the manager of the successful Irish boys band Boyzone.
Westlife had covered many songs by famous artists, including Sarah McLachlan, Billy Joel, ABBA, Phil Collins and Cliff Richard.
Westlife was formed in July 1998. It originally had 5 members: Shane Filan, Kian Egan, Mark Feehily, Nicky Byrne, and Bryan McFadden. In March 2004, Bryan has left the band to be with his wife, and after more than a year of silence, Westlife came back in October 2005 with new Album.
Westlife have made world records in their past years for the most no. one singles in a row.