Brian Nicholas McFadden (born 12 April 1980) is an Irish singer and songwriter, who rose to fame with Irish boy band Westlife before quitting the band to forge his own solo career. He was married to former Atomic Kitten member Kerry Katona, and is now engaged to Australian pop star Delta Goodrem. Brian has found considerable success in Australia since his relationship with Delta Goodrem. He is also the brother of Grease actress Susan McFadden who competed in and won ITV's Grease is the Word, which was searching for an actor and an actress to play Danny and Sandy in the musical Grease in London's West End.

Westlife are an Irish pop music group, formed in July 1998. They are signed by Simon Cowell and managed by Louis Walsh. The group is popular in the United Kingdom, Ireland, Australia and much of Europe, Asia, Latin America and Africa. McFadden performed with Westlife as Bryan, reportedly because it made signing autographs easier for him.

He departed from Westlife after the release of the album Turnaround.

With Westlife, McFadden sold more than 30 million albums and 7 million singles, had 12 #1 singles in the UK chart and sold out arenas all over the world.

Some of Westlife's songs were co-written by McFadden, such as:

"Fragile Heart" "Bop Bop Baby", "I Wanna Grow Old With You" "Love Crime".