Markus Michael Patrick Feehily (born 28 May 1980) is an Irish singer, best known as a member of the pop vocal group Westlife.

Westlife has released twelve albums, embarked on thirteen world tours and won several awards, becoming one of the most successful musical groups of all time.

Before Westlife, Feehily, Shane Filan and Kian Egan were members of the self-formed, six-piece, Sligo-based boy band IOYOU, previously named Six As One, which released the single "Together Girl Forever" and songs "Everlasting Love" and "Good Thing".

Boyzone singer Ronan Keating was brought in to co-manage the group with Walsh, assuming an advisory role.

In February 2015, Feehily launched his solo career with a radio premiere of his debut single "Love Is a Drug" on RTÉ 2fm in Ireland.

[6] Moments after the premiere of the song, it was made available for pre-order on iTunes,[7] with the official video for the track launching on his Vevo channel two weeks later.

In October 2018, a video was posted to Westlife's official social media platforms announcing the group's reunion as a four-piece.

In 2019 the group headlined "The 20 Tour", named in honour of Westlife's 20th anniversary since its formation and the release of its first single, "Swear It Again", in 1999.

[10][11] He announced on social media that he and Shane Filan co-wrote the new single for Emeli Sandé and Ronan Keating called "One of a Kind" released in 2020.

He has expressed his love for Sligo's picturesque and artistic environment, which he credits for playing a critical role in inspiring his musical aspirations and pursuits.

[16][17] In yet another interview, he told The Sydney Morning Herald that despite the fact that the majority of Westlife's fans are female, there had really been no negative reaction.