A stalker left television presenter Christine Lampard, the wife of ex-England star Frank Lampard, hiding in the couple's bedroom when he turned up at their house.
Christof King, a 39-year-old actor, has left the star too scared to go out alone after bombarding her with messages on Twitter, emails and visits for three years between January 2015 and last September.
The tweets included one that stated "I can hear the screeching of the nails as I sharpen them for your crucifixion" and another that said: "I am planning the writing on your gravestone."
Christine - who in May announced that she is expecting her first child with Frank - also received letters from King during the campaign. He also went to the couple's £10million Chelsea mansion several times.
Frank Lampard told how King turned up to their home on October 13 and his wife was horrified to see the stalker loitering at their front gate.
Prosecutor Alistair Smith told Isleworth Crown Court that King believed it was his "destiny" to be with the presenter.
"The motivation appears to be a belief that there's a form of bond or pre-destined emotional relationship," he said.
In her statement, Christine said: "I do not go out alone anymore - I always go out with someone."
Frank said in a statement that Christine and the housekeeper, Chona Angel, "hid in the bedroom" because they were so frightened.
He added: "It has both made us feel very vulnerable, she became flustered and very nervous and concerned for her safety.
"I could see that Christine was very anxious and shaken more than I have ever seen. The housekeeper refers to her saying not to go outside because of the stalker."
Last year, the television presenter revealed how her husband, 39, intervened to protect her from King when he booked into the same hotel as the couple.
Christine had told ITV's Loose Women: "There was a chap who had been trying to get in contact with me for a while. He thought we were married in his mind.
"He randomly turned up at the hotel we were staying in, which does freak you out because there's a sense that he knows where you are.
"Frank did go out and say, 'Look, you've got to stop, this isn't normal behaviour', and we haven't heard since."
Video: Christine Lampard talks about stalker on Loose Women
John Oliver, defending, said King denies ever sending the tweets and claimed it was not a "continuous" campaign.
King appeared in court on February 19 to apply to have the charge against him dismissed.
His counsel on that occasion, Danielle Barden, said it was not accepted that King caused Mrs Lampard "serious distress" and therefore a jury could not reasonably convict.
King has appeared as an extra in a series of student films and in Secret Cinema shows, which combine live performances with film screenings.
Christine married Frank in December 2015 after meeting the retired footballer at the Pride of Britain Awards in 2009. She is step-mother to Frank's two daughters from his previous marriage.
Judge Robin Johnson granted King bail before sentencing on Monday.
He said: "I am adjourning this matter until Monday and if you have any doubts of what will happen I'm sure Mr Oliver will tell you. The terms of your bail are as they have been before.'
King, of Kilburn, north London, admitted one charge of stalking.