HONG KONG - The four Heavenly Kings - Jacky Cheung, Andy Lau, Leon Lai and Aaron Kwok - are rumoured to be reuniting on stage for the first time in 15 years for the 25th anniversary celebration of Hong Kong's handover to China.

The last time all four Hong Kong stars - who were huge in the 1990s and 2000s - performed together was at the 10th anniversary concert in 2007.