A German translator has admitted stalking Eddie Redmayne after she saw him in a London play and followed him to film sets, premieres and private events.
Gaby Stieger, 49, repeatedly loitered outside the Oscar-winning actor's house in Southwark, south London, and sent him love letters, the Daily Mail reported.
Redmayne, 35, even spotted her in the crowd in Leicester Square at the premiere of the latest Harry Potter film which he starred in.
Stieger, of Colindale in north London, pleaded guilty to stalking at Camberwell Green Magistrates' Court on Wednesday (UK time).
Redmayne described the distress it caused him and his family in a statement read to the court.
He said: "I always try to be open and friendly as support (from fans) is what gives me a career.
"I deeply regret having met Gaby Stieger - she harassed myself and my family intermittently over five years, leaving us distressed, unsafe and deeply unsettled."
She would appear outside his house "out of nowhere - observing me and my family without us knowing", he added.
"The safety of my family is everything to me and with her behaviour we can't feel safe," he wrote.
He also said her face would "contort with rage" when she spoke about his wife Hannah Bagshawe.
Stieger first met Redmayne, 35, after seeing him on stage at Donmar Warehouse in Covent Garden in 2012.
The following year she began visiting the set while he was filming The Theory Of Everything and trying to get Redmayne to pose in a picture with her.
Stieger followed him and his wife to a carol service at Eton College in December 2013.
She can be seen staring at him in a photograph taken by a fan.
The mother-of-two, whose teenage daughters live in Germany, started sitting in a park opposite Redmayne's house.
She also followed him to his local Tube station and on one occasion asked him for a hug.
Stieger sent Redmayne letters "expressing admiration and love", prosecutor Sara Ashkboos said.
"She directly states she is in love with the complainant and asked him to reply," she added.
In one of her letters Stieger wrote: "I know things about you."
Redmayne also spotted her in the crowd in Leicester Square at the premiere of the latest Harry Potter film last year, which he had a lead role in.
He was so worried about the stalking that he contacted a solicitor and repeatedly told Stieger to leave him and his family alone.
In August 2017 Stieger approached Redmayne again outside his house, while he was with his baby daughter, and tried to touch his arm.
She was released on conditional bail and is due to be sentenced on Thursday afternoon.