Salman's upcoming production marks the debut of Aditya Pancholi's son Sooraj and Suniel Shetty's daughter Athiya.
The 49 year old actor teased his fans with a clip showing him recording the song titled, "Main Hoon Hero Tera", on his official Twitter handle.
He wrote, "Yeh dekho (See this) http://bit.ly/MainHoonHeroTeraTeaser." He posted the link to the 23-second video, which shows him singing in a studio.
Salman has earlier sung in his films like Kick and Wanted but this is special for it will be for another actor.
Hero is being co-produced by Salman Khan Films and Subhash Ghai, the film is a remake of the latter filmmaker's 1983 movie with the same name.
The film is slated to release on September 25.