Gangland identity Roberta Williams has been charged with a string of offences over the alleged kidnapping of the producer of her proposed reality television program.

Ms Williams, the former wife of serial killer Carl Williams, has been charged alongside two men with nine offences including making threats to kill, causing serious injury and false imprisonment and is due to face court this afternoon.

She was arrested at her home in Strathmore, in Melbourne's north-west, on Wednesday morning. Nine News footage showed her being led away in handcuffs.

The Age last month revealed Ms Williams was being investigated over an alleged extortion and kidnapping plot following claims that she imprisoned and assaulted Ryan Naumenko, the producer of her proposed television show.