The group are to embark on Dublin's 3Arena with these shows on December 20 and 21, high demand saw them add an extra show date for December 22, which was also sold out quickly.
This comes after the group which consists of Shane Filan, Mark Feehly, Kian Egan and Nicky Byrne, played several sold out shows at London's Wembley Stadium, along with two nights at both Pairc Uí Chaoimh and the Aviva Stadium as part of a major live tour last year.
Westlife will also take this tour to Asia later this year, along with several shows at various arenas across the UK.
Since coming back to the music scene in 2018, Westlife have enjoyed a rather fruitful return to music, with their first two albums reaching number one and two in the Irish charts.