Bollywood superstar Shah Rukh Khan, who is on an eight-city tour for his mega-budget "RA.One" is all smiles, after the first look of Arjun Rampal received thumbs up from fans and film fraternity.

"Am so glad everyone likes Arjun's look in the theatrical trailer...the guy worked his butt off for it and his hair!! thanx bro for the belief," Shah Rukh posted on his Twitter.

Directed by Anubhav Sinha, the film also has Kareena Kapoor in the lead role. It is set for a Diwali release.