Shah Rukh Khan, who plays a superhero in his upcoming film Ra.One (First Look), is nursing an injured knee and on painkillers. The actor wrote on his Twitter micro-blog on April 29, “Very tired and in pain. Have to get up and do some solid physio… work out. Painkillers are making me sleepy.”

SRK even candidly admitted to his smoking habit, “Started to smoke when I was 27 (years old). Yes, want to give up smoking, but then we don’t always get what we want. Ha ha!”

The Bollywood superstar also revealed the meaning of his film’s title, “Ra. One is Random Access Version One, (you) will understand when you see the film.” SRK’s character in the film is called G.One.

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