Afshan Azad, 22, who appeared in blockbuster films as Padma Patil, was attacked and "slag" when members of the Muslim found about her boyfriend.
The actress was so frightened that she fled from her bedroom window and then fled their home town.
Police were called and his father, Abul Azad, 54, and brother Ashraf, 28, was arrested and charged with threatening to kill them. Actress's brother was also charged with assault.
But Azad Miss yesterday refused to testify and failed to appear at their trial at Manchester Crown Court
Instead, Crown prosecutors decided to charge an admission of guilt to receive from his brother, while men were acquitted of formal threat to kill.
Your father will be accepted through bound for £ 500, to keep the peace for 12 months.
Azad Miss plays a witch at Hogwarts, the school studied in the same year as Harry Potter, played by Daniel Radcliffe.
He first appeared as a character, twin brother of Parvati Patil in Harry Potter and the Goblet of Fire.
QC Richard Vardon, prosecuting, said the actress was "fun assault victim from her brother" in the family home in Longsight, Manchester in May.
He added: "The reason for the attack, it seems that their relationship with a Hindu man who seemingly came from his family, who rejected a Muslim."
Mr Vardon said Abul Azad awakened by his son, Ashraf, and exclaimed: "Sort your daughter She slag."
He continued: "He continues, new attacks and shouted:" Kill them! "'
Reading from a victim's statement added that the prosecutor: "My father started saying that he would do it to kill the reference to it, because he did not want his children, blood on their hands, and then it was time for them to do. They began to feel very frightened."
Her father allegedly threatened to take him to Bangladesh, and forcing them to have an arranged marriage.
Azad Miss called the police, but after his testimony, insisted he did not want to take further action.
Appearance: Brother Ashraf (left) and father Abdul (right) arrives at Manchester Crown Court
He fled to London and then claimed that he could not understand her father's Bengali accent and is difficult to have misheard what he said.
The actress later gave a statement to the lawyer the two suspects' said: "I love my dear father and brother.
"This process is causing me no end of trouble and if it comes first, it will make things worse for me."
Mr Vardon said steps have been taken to try to ensure that they testify, but it is not possible to make sure they voluntarily come to court.
My brother pleaded guilty to one count of assault and will be sentenced in January.
He was under the condition that he saved lives in the family home, not in contact with her brother and not have to travel to London.
Talent: Azad Miss starred with Rupert Grint in Harry Potter and the Goblet of Fire. He also appeared in other films in the series
Appearance: Brother Ashraf (left) and father Abul (right) arrive at Manchester Crown Court
She fled to London and later claimed she could not understand her father’s heavy Bengali accent and may have misheard what he said.
The actress later gave a statement to the two suspects’ lawyer saying: ‘I dearly love my father and brother.
‘The proceedings have caused me no end of distress and if it goes ahead, it will make things much worse for me.’
Mr Vardon said steps had been taken to try to make sure she testified but it had not been possible to ensure she came to court voluntarily.
Her brother pleaded guilty to one count of assault and will be sentenced in January.
He was bailed on condition he lives at the family home, does not contact his sister and does not travel to London.
