Louis Walsh teased the band's comeback last year, telling RSVP Live magazine that a reunion for the Flying Without Wings singers was definitely on the cards.
"A Westlife reunion is definitely going to happen - but I have no idea when," the music manager said at the time.
He added: "I'm still really good friends with all of the lads. I think the reunion will be great, but it's up to them to decide when they will do it."
The group were propelled into the limelight in 1998 but the boy band disbanded in 2012, with their 20th anniversary being celebrated this year.
Westlife were one of the UK's biggest boybands, first breaking onto the scene in 1999 with Swear It Again, leading to 13 UK Number One singles and ten Top Ten UK albums.
Fans were distraught when the group decided to split in 2011, embarking on a farewell tour to celebrate their 14 years in the music business.
The group became a foursome, made up of Nicky Byrne, Kian Egan, Mark Feehily and Shane Filan, in 2004 following the departure of Brian McFadden.
Representatives for Westlife have been contacted for comment.