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Mel Gibson - Mel Gibson acquired a religious stalker in 2004. He turned up at Gibson's church.

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'Passion of the Christ' - Idaho-born Zack Sinclair said he was on a mission from God to pray with Gibson.  He sent 12 letters to the actor and director saying that God wanted them to pray together.

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Restraining order - The stalker violated a restraining order and was re-arrested 24 hours after the order was issued.

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Prison - Sinclair was eventually sentenced to three years in prison by an LA court.

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Sophie Monk - Between 2010 and 2013 Sophie Monk had a crazed stalker who sent her threatening messages on social media.

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Threaten - James Scott McCabe even threatened to kill himself in order for them to be together.

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Lights on - Sophie was said to have been so terrified she slept with the lights on during the ordeal.

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Prison - The stalker was given a sentence of eight months in prison, suspended for two years. However, he recently hit a policeman while on probation, so is now residing in jail.

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Olivia Newton-John - Olivia Newton-John has been the subject of more than one crazy stalker obsession during her lifetime.

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Delusional - Her most dedicated stalker was Ralph Nau. He wandered into the hot Arizonian desert and experienced a vision telling him that Olivia Newton-John loved him and needed him.

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Australia - He twice travelled to Australia trying to track down Olivia Newton-John, failing both times.

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Dead cow - Back home in the US, Nau engaged in all kinds of bizarre behaviour, including sleeping inside a dead cow. He suffered a delusion that his step-brother had turned into an animal, so Nau killed his sibling with an axe. He was placed in a psychiatric institution.

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Peter Hitchener - Melbourne newsreader Peter Hitchener called police after being bombarded with death threats and abuse from a crazed stalker.

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Death threats - The death threats came from former Channel 7 employee Tony Pereira, who believed that Hitchener was responsible for him losing his job.

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Police - Hitchener was forced to call the police when the stalker turned up at his work at Channel 9's studios in Docklands.

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Well known - Apparently, Pereira had a long history of harassing media personalities that was known to police.

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Maria Venuti - The much-loved singer Maria Venuti was terrorised by a stalker who believed he was her husband.

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Stroke - In November 2016 she suffered a catastrophic stroke due to the stress of being confronted in her own home by the crazed stalker.

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Problems - The stalker was apprehended by police and held for psychiatric assessment.

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Daughter update - Her daughter recently shared an update about her mother's health, telling the Daily Telegraph, "Her life doesn’t have to stop because she had a stroke. She can still be fabulous and inspire people more than ever”.

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Ita Butrose - Accomplished journalist Butrose has revealed she spent more than a decade being stalked by a man named Fred, who suffers from bipolar disorder.

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Medication - When Fred was off his meds, he would become enamored with Butrose and stalked her in her work carpark.

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Engagement ring - Fred would send love letters, and even a diamond engagement ring that Butrose gave to the police.

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Manic - Fred was never charged and she has not received any recent unwanted attention.

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Sonia Kruger - Sonia Kruger has had two serious stalkers in her life.

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Writer - One of the stalkers would send in strange and sometimes derailed letters to her work.

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Same stalker - The stalker who harassed Peter Hitchener also targeted Kruger with some threatening letters.

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Hand deliver - One stalker would hand deliver the strange letters but luckily security kept him at bay.

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Stalkers - According to research obtained by news.com.au, up to 15% of the Australian population may be stalked at some point in their life.

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