The woman who started the record-breaking anti-Brexit petition says she is "shaking like a leaf" after receiving three death threats by phone.
Margaret Georgiadou, 77, began the Revoke Article 50 petition, which had topped four million signatures by Saturday morning.
She said she was "totally amazed" it had become the most popular petition submitted to the Parliament website.
But Mrs Georgiadou said the "horrible" phone calls left her scared and angry.
The retired lecturer says she has also received abuse via her Facebook account.
She said: "I feel terrible, I feel angry with myself because I thought I was tougher than that. But I was scared."
"I haven't even told my husband because he is very old and he would become hysterical."
Mrs Georgiadou said she created the petition to stop people "moaning" about how awful they thought Brexit was going to be.