Shah Rukh Khan feels his mega budget film "RA.One" has been blessed by superstar Rajinikanth, who shot a cameo for the superhero film in Mumbai over the weekend.

"Sitting with Soundarya (Rajinikanth's daughter) and seeing the edit of Rajini sir's shoot. He is like a celestial being...the whole office is beaming with happiness. WOW, " Shah Rukh posted on microblogging site Twitter.

Rajinikanth, who starred in India's so far most expensive film "Endhiran", took a break from work post his treatment in Singapore earlier this year. But the 60-year-old didn't refuse Shah Rukh's invite for the cameo.

'RA.One' completed today. Rajini sir blessed it. Have tears in my eyes of gratitude and only prayers and love for his whole family. You complete us sir, " Shah Rukh tweeted late Sunday.

"Misconcepts, misunderstood. Stressed and then Rajini sir walks on sets and you know why god made films. Thanks Soundarya for making our dream come true, " he added.

"RA.One", which also features Arjun Rampal and Kareena Kapoor, will release Oct 26 on Diwali.