Bollywood star Shah Rukh Khan on Tuesday said he was not part of any signature campaign to "save" jailed actor Sanjay Dutt, saying "we understand that the law will take its own course."

"We are not illiterate nor are we stupid. We understand that the law will take its own course and I am sure his (Dutt's) family also realises that. I don't know where this news has come from," Shah Rukh said here on the sidelines of a promotional event here this evening.

"Of course, as a friend I do wish him all the best. But we do realise that we cannot change the way the law functions. Nor would I want that the courts change their decisions just because some say so. That is not how it works at all," the superstar added.

Shah Rukh's name had figured in a section of the media as one of the Bollywood personalities who were thinking of starting a signature campaign in support of Dutt who has been sentenced to six years in prison for illegal possession of arms by a special TADA court which tried accused in 1993 Mumbai serial blasts.

Special Public Prosecutor in the case Ujjwal Nikam had lashed out at such campaigns, saying they amounted to contempt of court.

The 48-year-old actor is lodged in Pune's Yerwada Jail and his lawyers on Tuesday approached the Supreme Court against his conviction and also applied for bail.