"Tonight" is a song by Irish boy band Westlife. It was first released as a single in Sweden on 21 March 2003. In the United Kingdom, "Tonight" was issued as a double A-side single with "Miss You Nights" three days later. It served the second and final single from their first compilation album, Unbreakable – The Greatest Hits Volume 1 (2002). The double A-side peaked at No. 1 in Ireland, becoming Westlife's 10th number-one single in their home country. In the UK, the single reached No. 3 on the UK Singles Chart.