In 1970, Brennan joined her two brothers Pól and Ciarán, and their mother's twin brothers Noel and Pádraig Ó Dúgáin, and eventually formed Clannad.
They were introduced to television by Irish musician and broadcaster Tony MacMahon.
After enjoying a decade of being among the world's foremost Irish musical groups, Clannad graduated to chart success in 1982 with the album Magical Ring.
Brennan was at the forefront of the group's success and her voice suddenly became synonymous with Celtic music and Irish music.
She recorded 17 albums with Clannad and has won a Grammy, a BAFTA and an Ivor Novello award with the quintet.
Her sister, Eithne Ní Bhraonáin, spent a couple of years with Clannad in the early 1980s, and went on to pursue a very successful solo career under the name Enya.

Following Clannad's 2008 reunion tour, it was announced that Brennan would be working on a new unplugged album with the group, for release in 2009, but that never came to fruition.
In 1970, Brennan joined her two brothers Pól and Ciarán, and their mother's twin brothers Noel and Pádraig Ó Dúgáin, and eventually formed Clannad. They were introduced to television by Irish musician and broadcaster Tony MacMahon. After enjoying a decade of being among the world's foremost Irish musical groups, Clannad graduated to chart success in 1982 with the album Magical Ring. Brennan was at the forefront of the group's success and her voice suddenly became synonymous with Celtic music and Irish music. She recorded 17 albums with Clannad and has won a Grammy, a BAFTA and an Ivor Novello award with the quintet. Her sister, Eithne Ní Bhraonáin, spent a couple of years with Clannad in the early 1980s, and went on to pursue a very successful solo career under the name Enya.
Following Clannad's 2008 reunion tour, it was announced that Brennan would be working on a new unplugged album with the group, for release in 2009, but that never came to fruition.
Moya Brennan