Actress-director Revathy, who is awaiting the release of her upcoming directorial 'Salaam Venky', which stars Kajol and Vishal Jethwa, has shared how Bollywood superstar Aamir Khan came onboard for the film.

The film is about a DMD (Duchenne muscular dystrophy) patient (played by Vishal), who strives to live to the fullest and how his mother (essayed by Kajol) does everything in her capacity to make it better for her son.