Combo photo shows Rajinikanth, SPB and Kamal Haasan.

Tamil superstar Rajinikanth expressed grief at the demise of legendary singer SP Balasubrahmanyam on Friday, and offered condolences to the family of the late singer.

"#RIP Balu sir... you have been my voice for many years ... your voice and your memories will live with me forever ... I will truly miss you ..." Rajinikanth wrote on his verified Twitter account.

SP Balasubrahmanyam and veteran actor Kamal Haasan have been a popular combination of the audience for long. Stating that Balasubrahmanyam is a national voice, Kamal Haasan noted how the departed icon was an artiste who celebrated talent.

SPB had sung songs like "Sorgam madhuvile", "Orey naal unainaan" and "Aadungal" for Kamal Haasan.

The singer made his Bollywood debut in 1981 as Kamal Haasan's voice in the blockbuster romantic tragedy, "Ek Duuje Ke Liye".

Rajinikanth also shared a video speaking in Tamil, where he said: "Today is a very sad day for everybody. SPB struggled till the last minute. I am in deep pain. Today, all music lovers, people who knew him and everyone, are in deep sorrow. His voice and songs are loved by people across the country. His nature was such that he was very respectful towards everyone, be it a person younger or older than him, be it rich or poor.

SP Balasubrahmanyam lent his voice to several Rajinikanth numbers like "Balleilakka" in the film "Sivaji The Boss", "Konji konji" in "Veera", and "Vanthenda palkaran" in "Annamalai" and many more.

The Padma Bhushan award-winning singer breathed his last in Chennai on Friday at the age of 74.