"Just got back from recording my first song composed and sung by me! Feels good have got papa's nod which felt great. 1 down 5 to go, " Neil posted on micro-blogging site Twitter.
"My first composition is a tribute to my grandfather, " he added.
The 29-year-old, who earlier sang in films like "Aa Dekhen Zaraa" and "Jail", has joined hands with music director Gaurav Dasgupta for the new song.
"I'd like to thank Gaurav Dasgupta and Roshan (singer) who helped me make this happen. They are the producers of the song, " wrote Neil.
For now, the actor has wrapped up shooting for Abbas-Mustan's "Players".