Fiona Harvey, who is said to be the "real Martha" from TV series Baby Reindeer, is said to have bombarded Labour leader Sir Keir Starmer with emails.
The Netflix series, which is said to be based on a true story, follows a man who meets a woman named Martha who develops an obsession with him and begins stalking him.
Harvey reportedly sent the Labour leader 276 messages in an eight month period.
The emails, seen by the Sun, included attacks on him and his family.
Harvey sent the Labour leader 276 messages in an eight month period
PA
They were sent to Starmer's MP email address between January and August 2020.
Harvey is claimed to have told Starmer he was in a "non job", and referred to him as a "stupid little boy" and a "useless barrister".
She is also said to have threatened to complain to the standards watchdog about him, warning: "Your life won’t be worth living".
According to the Sun, the emails were filled with punctuation and spelling errors and were all signed off "Sent from my iPhone".
Harvey has denied allegations of stalking and has threatened to sue after episodes began with a message saying “this is a true story”.
One email, sent on April 9, 2020, is said to read: “Keir cut the crap with me you stupid little boy.
"You get elected leader of. Non party and within two minutes I get an email calling me a racist from the housing ombudsman I’ve already complained about you to the standards commissioner who guess what also does nothing.
"See from now on il l complain about the slightest little thing.
“Your life won’t be worth living.”
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Harvey identified herself as the woman who inspired Martha, but denied stalking the show's writer Richard Gadd.
The 58-year-old said the show’s depiction of her was “defamatory”.