Boy'z is a Hong Kong Cantopop duo produced by EEG consisting of members Kenny Kwan and Steven Cheung.

They were based on another Hong Kong popular prefabricated duo, Twins, who was also formed by Emperor Entertainment Group.

On 13 January 2005, it was announced that Boy'z would be splitting and disband as early plans and Kenny Kwan would continue his career as a solo artist.

In February 2005, Dennis Mak (麥子豪, born 7 May 1987), top 5 finalist of the EEG Singing Contest 2004, who was originally planned to have a solo career, will continue Boy'z with Steven Cheung.

After having success in the cantopop music scene, their record company EEG decided to have them turn to mandopop and a new Mandarin album titled 初次約會 (First Date) was released on 17 December 2007.

After William Chan left the group, Sun Boy'z became a cantopop duo with only Steven Cheung and Dennis Mak.

It was officially confirmed in December 2008 that Sun Boy'z will disband with Dennis Mak leaving the entertainment industry.

In the meantime, Steven Cheung, William Chan and Kenny Kwan would continue to pursue their careers as solo artists.

In September 2007, Sun Boy'z went on a North America tour with Twins and several concerts were held in a few different states in addition to Canada.