The event took place Sep 22 in Hong Kong where all three actors enjoyed dancing to popular tracks from the movie such as "Radha teri chunri", said a statement.
"Sidharth Malhotra recently had a small reunion with his fellow co-stars Alia and Varun. They performed on all the popular songs of their debut film on this Saturday in Hong Kong," said a source.
Meanwhile all of them are busy with their individual projects.
While Alia will soon be seen in Imtiaz Ali's "Highway", a movie adaptation of author Chetan Bhagat's "Two States", Varun will be seen in his father David Dhawan's directorial venture "Main Tera Hero".
Sidharth will show grey shades in Ekta Kapoor's upcoming project "The Villain".