"I am most keen to see 'Robot'. Rajni sir rocks!" Aamir posted on social networking site Facebook.
The movie, which is called " Endhiran" in Tamil, also features Aishwarya Rai. Apparently made at a budget of Rs.175 crore ($38 million), it is being lapped up by audiences across India.
Actors who have seen the movie are all praise for it, but have pointed to its inordinate length.
Riteish Deshmukh posted on Twitter: "Superstar Rajni! He is a phenomenon. Action in 'Robot' is just what you want to watch as a Rajni fan. Go watch it now - a bit long but worth it."
Actor Tusshar Kapoor opined: "...quite a fun film but a bit long. Rajni looks young and energetic even at this age. No wonder he's such a superstar."
Actress Sameera Reddy went gaga over the 60-year-old actor. "As the No.1 Rajnikanth fan, I am so proud that he has kicked ass at the box office! So proud of you Rajni sir! You are the best!" she tweeted.